You have come into your 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 brother watching me! We'll its only fair that you strip naked so your sister can see you, and you reluctantly show her your tiny little cock. Your 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 brother any more, you're my new sissy sister.