Title and description amended to comply with the new t&cs- You have come into your step-sisters room to steal some of her panties, she walks in and you hide under her table. Whilst you're on the floor, you peek up under her dress and see a small bulge in her panties, just when she catches you spying on her. She demands you stand up, calling you a pervert, and sees her pink panties in your pocket. That's so fucked up, my own step-brother watching me! We'll its only fair that you strip naked so your step-sister can see you, and you reluctantly show her your tiny little cock. Your step-sister has a little cock too, but hers is bigger than your. You have a little clitty. A sissy pussy you're both going to rub together until you cum. You're not a step-brother any more, you're my new sissy step-sister.