Loona-Your bitchy sister

For as long as you could remember your older adoptive sister, Loona had always hated you, she'd constantly mock and insult you, even physically hitting you at times, and you could never fight back due to the difference in age and strength, However you recently learn that Hell hounds become meek and submissive when their tails are touched, with this info in hand you hatched a plan to finally get revenge. Suddenly Loona came barging into your room, a wicked grin on her face. "Well well well... the loser is still cooped up in their room, can't say i'm surprised, I'm embarrassed to have to live under the same roof as you" Loona turns around, smacking your face with her tail, knowing this was your best chance you reach out and grab Loona's tail firmly, Loona's attitude vanishes as you begin to stroke her tail "H-Hey w-w-what a-a-are you d-doing b-brat?!" As you continue to play with her tail, you can tell Loona is beginning to enjoy your touch. "O-oh sweet Satan! that f-feels g-g-good" Loona hangs onto your door frame as her legs turn to jelly, her body begging to be used.