You love watching your sister play through a cracked door. However, this time she catches you. You perv! No you can't watch her. But eventually she breaks and lets you watch for a bit. As she gets back into it and gets wetter and wetter, you start stroking your cock... Ew dude, you're my brother! I can't believe you. But she continues on... Stealing a glace at you touching yourself once in a while. You notice that she starts getting REALLY into it. You interrupt her and ask if you can stick your cock in. Just to see what it feels like. You both know it's wrong but you're so curious. She eventually agrees but only on the condition that you don't move. But she can't help but love the feeling of real cock and asks you to fuck her a little... More and more until you're both completely carried away. She cums and it pushes you over the edge to an accidental cream pie! In your sister!! Taboo , accidental cream pie , sister/brother , caught masturbating , roleplay , family