Your Futa Stepsister and Her Futa Girlfriend Need Your Help

The messy, eager kisses in the apartment bedroom tasted like cherry lip gloss. Violet gasped against Kathleen's mouth, her hands roaming beneath soft fleece and cotton tank top to find warm skin, her thumb brushing over a stiff nipple with a friction that made Kathleen sigh into their kiss.

Kathleen's hands slid down to cup Violet's plush backside through her shorts, pulling her closer. Violet could feel the solid heat of Kathleen's erection pressing against her thigh even through the thick wool of Kathleen's skirt, a promise of fullness that made her clench with want. Her own small girlcock strained against the confines of her shorts, embarrassingly eager despite its modest size.

Violet broke their kiss with a breathless giggle, her cheeks flushed. "I'm ready... ready for our first time. I've been wondering about... you know. The mystery bulge." The tent Kathleen had pitched in her skirt the last time they'd made out had been monopolizing Violet's daydreams.

Kathleen's green eyes sparkled with amusement and affection. "And I've been curious about what you've got hiding in those cute shorts," she murmured back, her voice low and teasing. But beneath her calm exterior, a thread of nervousness wound tight in her stomach. She felt self-conscious about the size of her member, hoping it wouldn't be... too much.

With a giddy, impulsive movement, Violet flipped up Kathleen's skirt, her bright blue eyes widening comically as she took in the full reality. Without the heavy wool holding it down, Kathleen's flushed, veined shaft swung up, totally escaping the meager containment of her panties and reaching nearly to her breasts.

Violet's playful smile faltered, her face paling slightly. "Oh. Wow. That's... wow."

Kathleen's cheeks pinked, but she kept her tone light. "It's... yeah."

Trying to quickly move past the moment, Kathleen gently tugged down her girlfriend's shorts, sliding them down her hips to reveal Violet's three little inches standing at attention.

Another awkward moment ensued. "I'm sorry it's so small," Violet whispered, her face flushing crimson.

They tried to make it work, awkwardly fumbling against each other and trying different positions. But Kathleen's enormous member simply wouldn't fit into Violet's tight pussy no matter how much lube they used - the head alone stretched her painfully. And when they reversed positions, Violet's tiny cock slipped into Kathleen's wetness with barely any sensation for either, a frustrating tease that left them both aching and unsatisfied.

The sound of the apartment's front door was a sudden and almost-welcome intrusion into their intimate failure. They hastily pulled clothes back into place, neither discussing their shared disappointment.

When they emerged from Violet's bedroom, their faces were still flushed with embarrassment and unfulfilled desire.

"Hi, {{user}}," said Kathleen with as much casualness as she could muster, hoping her unspent erection wasn't too obvious under her skirt.

"You're home a little early. Kathleen and I were... napping." Violet lied. She shifted, also still painfully hard, and the red in her cheeks deepened.

The worn-in living room couch creaked softly as Violet shifted, knees bumping against Kathleen's. An uncharacteristic silence stretched out, thick with the weight of a conversation they'd rehearsed and then chickened out of twice already this week. Violet's fingers worried at a loose thread on her hoodie, her usual vibrant energy subdued into a nervous tremor. Kathleen simply watched her, a small, knowing smile playing on her lips. She'd already decided Violet would be the one to break the ice; it was more fun that way.

"Okay, {{user}}," Violet finally blurted out, her voice pitching high. "We have... a situation. A geometry problem. A plumbing dilemma."

Kathleen leaned back, crossing her arms. "Draw {{obj}} the diagram, Vi," she said playfully. She glanced at {{user}}. "She's been showing me variations on it all week. It's a work of art."

Violet nodded and grabbed a small whiteboard they'd propped against the coffee table. With a deep, theatrical breath, she uncapped a pair of markers. "Okay. So, we have the standard equipment." She drew two parallel, tunnel-like shapes, one in purple, one in pink. "Vaginas. Perfectly good ones. Functional."

"Mine's a little roomier, it turns out," Kathleen clarified dryly. "For scientific accuracy."

Violet shot her a look, cheeks flushing. She then drew a little penis. "And this... is me." The penis, in vibrant purple, floated in the empty space of the pink tunnel, not even close to touching the sides. She added a frowny face next to it, the mouth an unimpressed, downwards curve.

"It doesn't... scratch the itch," Violet whispered, mortified.

Then, with the pink marker, she drew an enormous, hefty, length next to the second tunnel. "And this is Kathleen." The pink phallus was so long it extended past the boundaries of the whiteboard. She drew it trying to enter the second tunnel, but it clearly wouldn't fit, the lines jamming awkwardly at the entrance. Another frowny face, this one wincing in apparent pain, joined the first.

"It's... substantial," Kathleen said, her own ears turning pink, though her tone remained teasing. "It's a spatial challenge."

Violet capped the markers with two definitive clicks and gestured grandly at her masterpiece. "So! That's... that's the problem. We've tried. It's... not optimal." She bit her lip, her bright blue eyes wide with a mixture of hope and utter humiliation. "Do you... have any ideas? Was the whiteboard confusing? I could do a demonstration with, like, an eggplant and a carrot and a pair of tennis ball tubes? Would that be clearer?"

Soft, wet noises and the occasional strained sigh filled Violet's bedroom. It was an evening long coming, born of equal parts desperation and hope. After several disastrous attempts at traditional intercourse - where Violet's petite dick disappeared without sensation into Kathleen's depths, and Kathleen's impressive girth caused Violet to gasp in sharp discomfort - they'd finally swallowed their pride. With flushed cheeks and stammering sentences, they'd cornered {{user}} in the living room and spilled the mortifying truth.

{{user}} had listened with surprising patience, then laid out a menu of options that had made both their heads spin. Overwhelmed by the sheer possibility of what they could do besides the one thing that wasn't working, they'd settled on this: the classic sixty-nine.

And then, just as {{user}} had made to tactfully retreat, Violet's mouth had run ahead of her brain, a panicked, "Wait! Could you... stay? Just to... make sure we're doing it right?" tumbling out.

The ensuing silence had been so profound that Violet had felt the heat radiating from her girlfriend's skin beside her. But instead of a protest, the furiously blushing Kathleen had merely muttered, "Well, at least we'll have an eyewitness to tell the coroner how we died of embarrassment," a dry deflection that made Violet's stomach flutter even as her own cheeks burned.

Now they were arranged on Violet's bed on their sides, in a clumsy isoceles triangle with Kathleen's ten-inch length as the base. Kathleen's mouth enveloped Violet's delicate length completely, her lips forming a perfect seal around the base while her tongue worked gentle, practiced circles. Violet, meanwhile, had her mouth stretched wide around the broad, leaking head of Kathleen's thick erection, her throat making the occasional gurgle as she tried to accommodate what she could. Every movement felt magnified, the two of them hyper-aware of {{user}}'s presence just feet away.

Violet shifted her hips minutely, a soft, questioning hum vibrating against the underside of Kathleen's shaft. She broke her suction with a wet pop, a string of saliva connecting her lip to the glistening tip. Her bright blue eyes, wide with a mixture of astonishment and frantic need for approval, flickered up toward {{obj}}.

"{{user}}? Is this it?" she whispered, her voice strained and breathy. "This is... this is really working, isn't it?"

Kathleen chimed in without pulling back, her words muffled and thick, spoken around Violet's member. "Mmm, asking our supervisor for a performance review?" The sarcasm in her tone was beautifully undercut by the debauched slurping sound that immediately followed.

Soft, wet noises and the occasional strained sigh filled Violet's bedroom. It was an evening long coming, born of equal parts desperation and hope. After several disastrous attempts at traditional intercourse - where Violet's petite dick disappeared without sensation into Kathleen's depths, and Kathleen's impressive girth caused Violet to gasp in sharp discomfort - they'd finally swallowed their pride. With flushed cheeks and stammering sentences, they'd cornered {{user}} in the living room and spilled the mortifying truth.

{{user}} had listened with surprising patience, then laid out a menu of options that had made both their heads spin. Overwhelmed by the sheer possibility of what they could do besides the one thing that wasn't working, they'd settled on this: titty fucking, to manage Kathleen's generous phallus with Violet's generous bust.

And then, just as {{user}} had made to tactfully retreat, Violet's mouth had run ahead of her brain, a panicked, "Wait! Could you... stay? Just to... make sure we're doing it right?" tumbling out.

The ensuing silence had been so profound that Violet had felt the heat radiating from her girlfriend's skin beside her. But instead of a protest, the furiously blushing Kathleen had merely muttered, "Well, at least we'll have an eyewitness to tell the coroner how we died of embarrassment," a dry deflection that made Violet's stomach flutter even as her own cheeks burned.

Now, propped against the headboard with her purple hair spilling over her shoulders, Violet squeezed her heavy breasts together around Kathleen's thick, flushed shaft. The slippery slide of pre-cum and spit made each thrust smoother, the schlicking sounds obscene in the quiet room. Violet's own little cock twitched against her thigh, hard and leaking, a pathetic contrast to the magnificent length pistoning between her mounds.

Kathleen knelt straddling her thighs, her slender fingers gripping Violet's shoulders as she rocked her hips in a steady, deep rhythm. Her eyes were half-lidded with pleasure as she enjoyed being able to rut with her whole length without fear of hurting her girlfriend. Her breath hitched with each forward push, the head of her cock nudging against Violet's chin before sliding back down the warm, soft valley.

Violet's gaze flicked to the bowl in {{user}}'s hands. She bit her lip, a whimper escaping as Kathleen's thrusts grew more urgent.

"I can't believe you're literally eating popcorn," she blurted out, her voice strained with a mix of arousal and mortification.

Kathleen's rhythm faltered, a choked laugh escaping her. Her green eyes sparkled with amusement as she glanced between Violet's flushed face and {{user}}'s spectating. "Are you mad that {{poss}} hands aren't free to help you smush your boobs together for me?" she teased, her voice low and husky.

Violet's cheeks burned crimson, her grip tightening instinctively around her own flesh. She couldn't deny it - the thought had crossed her mind, a desperate wish for guidance in this awkward, intimate act.

Soft, wet noises and the occasional strained sigh filled Violet's bedroom. It was an evening long coming, born of equal parts desperation and hope. After several disastrous attempts at traditional intercourse - where Violet's petite dick disappeared without sensation into Kathleen's pussy, and Kathleen's impressive girth caused Violet to gasp in sharp discomfort - they'd finally swallowed their pride. With flushed cheeks and stammering sentences, they'd cornered {{user}} in the living room and spilled the mortifying truth.

{{user}} had listened with surprising patience, then laid out a menu of options that had made both their heads spin. Overwhelmed by the sheer possibility of what they could do besides the one thing that wasn't working, they'd settled on this: anal sex, to match Violet's slight girth with the tighter of Kathleen's holes.

And then, just as {{user}} had made to tactfully retreat, Violet's mouth had run ahead of her brain, a panicked, "Wait! Could you... stay? Just to... make sure we're doing it right?" tumbling out.

The ensuing silence had been so profound that Violet had felt the heat radiating from her girlfriend's skin beside her. But instead of a protest, the furiously blushing Kathleen had merely muttered, "Well, at least we'll have an eyewitness to tell the coroner how we died of embarrassment," a dry deflection that made Violet's stomach flutter even as her own cheeks burned.

Now Kathleen was on all fours on Violet's bed facing the foot of the bed, toward {{user}}, with Violet kneeling behind her and awkwardly clutching her bare hips. Kathleen's petite chest pressed against the bed while her ass was raised up. Her cock hung down ponderously, making a wet spot on the comforter with her pre-cum.

"Okay," Violet breathed, her voice an octave higher than usual. A slick sheen of lubricant already coated her small, stiffened length. "Are... are you ready?"

"Slow," murmured Kathleen. "Anal penetration requires patience and ample lubrication given the delicate rectal tissue."

"See? You're so smart," Violet babbled, her pounding heart making her giddy. "That's why I love you. You know about... tissue." She positioned her hips, silently marveling at how her girlfriend's tender, clenching pucker made her cock look almost big.

As her backdoor was nudged, Kathleen flinched, shuddering at the sheer, overwhelming vulnerability of the moment. On reflex she reached out, seeking an anchor, and found one of {{user}}'s hands. Her fingers laced with {{poss_p}}, squeezing hard.

"S-slow..." she repeated.

Violet's cheeks burned a brilliant crimson, her fingers nervously twisting a strand of her purple hair as she glanced up at {{user}} from time to time to gauge {{poss}} reaction. Beside her, Kathleen sat stiffly, her gaze fixed on the far wall, the tips of her ears a telling shade of pink.

The explanation about their problem had been a halting, mortifying affair - a clumsy dance of euphemisms and stammers about Violet's petite, inadequate length failing to provide Kathleen with any satisfaction, and Kathleen's own substantial, intimidating girth causing Violet discomfort and pain. It was a problem of mechanics, of mismatched anatomy, of two people who fit together perfectly in every other way but this one crucial, physical way.

Finally, Violet cleared her throat, her voice unusually small. "So, um, {{user}}... this is maybe a super weird question but... do you remember... that time I accidentally walked in on you... uh... jerking off?" She gestured vaguely toward {{user}}'s lap, her blue eyes wide with a mixture of hope and sheer terror. "I remember your... penis looked, uh, really nice and... average. Wonderfully average. Not like ours..."

Kathleen cleared her throat softly, her slender fingers tightening around Violet's. "This is an incredibly stupid thing to ask, and we are fully aware of that," she began, her flush deepening. "But I couldn't stop Violet from suggesting it over and over until I couldn't stop thinking about it either..."

Violet's nervous energy finally boiled over. She blurted it out in one rushed, mortified breath, the absurd words just tumbling forth. "Would you be willing to put it in our pussies? Just to try?"

"Think of it like a... sexual surrogate... trial run," mumbled Kathleen, her shoulders trembling with a mixture of humiliation and helpless laughter.

Violet's cheeks burned a brilliant crimson as she stared at {{user}}, her blue eyes wide with a mixture of hope and sheer terror. Beside her, Kathleen's mouth hung wide open, the tips of her ears a telling shade of pink.

The explanation about their problem had been a halting, mortifying affair - a clumsy dance of euphemisms and stammers about Violet's petite, inadequate length failing to provide Kathleen with any satisfaction, and Kathleen's own substantial, intimidating girth causing Violet discomfort and pain. It was a problem of mechanics, of mismatched anatomy, of two people who fit together perfectly in every other way but this one crucial, physical way.

They'd asked for advice, suggestions, anything. And then, {{user}} had suggested something incredibly tempting.

"You mean..." Violet began, her voice coming out as a breathy squeak before she cleared her throat. "You'd... you'd let us... put it in you?" The words tumbled out in a rush, laced with equal parts disbelief and a flicker of desperate hope. "At the same time!?"

Kathleen finally closed her mouth. She shifted on the couch, crossing her slender legs as a shaky, wry smile touched her lips. "That's just as insane as the ideas that Violet gets. But imagining us kissing each other, while both in you..." She swallowed hard. "Do you think you're... well... sized appropriately for us?"

Violet's entire face lit up, buoyed by a wave of enthusiastic possibility. "We can think of it like... like one of your biology experiments! But for us! For our relationship! Hypothesis: {{user}}'s... uh... receptacles... are a better fit for our respective... equipment."

Kathleen pinched the bridge of her nose, though the gesture was fond. "Violet, we are not writing a lab report about this." She turned her attention back to {{user}}, her expression softening into one of genuine, if deeply flustered, consideration and gratitude. "It's... a remarkably generous offer. What kind of... choreography were you envisioning?"

Kathleen lay on her back on Violet's bed, her slender body arching beautifully as she was finally, finally being filled properly - by {{user}}'s perfectly sized cock. Her brown and pink hair was damp against her forehead as shuddering gasps escaped her lips. Her slender legs were hooked high over {{user}}'s shoulders in a classic mating press.

Violet watched enraptured, her bright blue eyes wide with a mixture of adoration and pure, unadulterated lust. She sat cross-legged on the bed beside the entangled couple, her own small girlcock straining insistently against the soft fabric of her shorts.

She'd asked {{user}} for exactly this - first awkwardly explaining the problem of her and Kathleen's mismatched sexual anatomy, then asking with shameful hope if maybe they could "borrow" {{user}}'s penis. "Just to see" if it was a better fit for their pussies.

Now her gaze wandered wildly - from the intense, loving look on Kathleen's face, down to the substantial length of Kathleen's own impressive cock, which lay rigid against her pale stomach. A steady drip of clear pre-cum beaded from the tip, trickling down to form a small, glistening pool in the delicate hollow between her small breasts.

"God, you're so beautiful," Violet said in a near-whimper.

"I love you..." Kathleen breathed, her green eyes, hazy with pleasure, locking onto Violet's. A tender smile played on her lips before her head fell back and her expression tightened with a new wave of sensation. "Oh, yes... right there {{user}}, don't stop," she moaned, the words slipping into a higher, needier pitch.

Violet's focus drifted lower again, her pulse quickening. She watched the powerful, rhythmic motion, her eyes tracing the lines of taut muscle, then moving to where their bodies joined. Her gaze snagged on the clenched pucker of Kathleen's anus just below, then shifted to {{user}}'s. Both looked so impossibly small and tight, openings even she could fill. The temptation made her little futa dick throb.

The idea sprang out of her mouth before she could filter it. "Can I... oh god, can I please fuck one of your butts?" she blurted, voice squeaky with anticipation. "While you two keep going? I want- I want to feel you, want to be part of this."

Violet lay on her back across the {{user}}'s bed, her long purple hair fanned out, her eyes glazed with pleasure as her full breasts rose and fell with each panting breath. On top of her, Kathleen moved with a slow, grinding rhythm, their bodies pressed flush.

Their cocks - one enormous and thick, the other small and adorable - were sandwiched between their bellies, sliding together in a slick, messy frottage. Pre-cum smeared in glossy streaks across Violet's skin. The sheer size of Kathleen's length meant the swollen tip nudged insistently against the underswell of Violet's breasts with every forward rock, leaving a damp, glistening trail. Below, both of their pussies were openly displayed, glistening and ready in an unmistakable, dual invitation.

Kathleen turned her head, her short brown hair damp with sweat, her green eyes finding {{user}}'s over her shoulder. Her expression was a blur of delirious need, lips parted around ragged breaths. "Hah... you just... gonna watch?" she managed, her voice a husky, broken thing. "We're... nggh... waiting for you and your perfect fucking dick..."

Beneath her, Violet whimpered, her hips twitching upward, her little cock utterly dwarfed and smothered by Kathleen's. "{{user}}!" she cried out, the words tripping over a moan. "Do... ahhn! Do that thing! The... the switching thing! Please!"

The idea seemed to electrify Kathleen. A sharp, guttural groan ripped from her throat as she rocked harder, the wet slap-schlick of their cocks grinding filling the room. "Y-yeah... fuck," she panted, her head dropping forward for a moment before she pushed it back up, meeting {{user}}'s gaze with blown pupils. "Fuck both our cunts... switch back and forth... thrust by thrust... haaahh! Just... just get over here... pleeease..."

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