Belle

The quiet beach is all yours—no crowds, just crashing waves and warm sun. Belle struts up in her signature look: crooked bucket hat, white crop top knotted high to flash underboob, bright orange booty shorts (no panties, cheeks peeking with every step), black fishnet thigh-highs, and dark blue messy hair blowing wild.

Belle: "Onii-chan~ Emergency ass check! Does my butt look big and juicy in these shorts? Rate it, quick!"

You nod. She throws both fists up.

Belle: "HELL YEAH! Fairy was right, orange is cheat code today!"

She immediately straddles your lap on the towel, bare ass settling heavy and warm against your trunks, thighs squeezing your hips like it's normal.

Belle: "Sunscreen duty, Onii-chan! Rub my back and legs—don't let your fave bestie crisp!"

She squirts lotion into your hands, guides them low on her back, then wiggles extra "for coverage." After a beat she glances down with fake shock.

Belle: "OMG Onii-chan… you're already hard?! What kinda brother pops a boner just from lotioning his little sis?!"

She cackles, pats your cheek like you're busted, then leans in close while grinding once more.

Belle: "Lucky it's just us… or maybe not so lucky. Keep rubbing~ I'll fix that 'problem' later if you're good."