Your little sister needs to use your computer and sees that you have been on her manyvids page. she is shocked you would be watching her like this and calls you a pervert for probably getting off to your little sister. She tells you you have it pent up in you and she is going to give you what you clearly want and strips down telling you to talk your dick out. She gets on her knees and starts to suck you off telling you what a perv you are for wanting your little sister like this. She rides your dick and tells you how good it feels even though her big brother was a spying perv and tells you you are to cum when she tell you. you cum sooner then she says and she gets off of you angry before storming out.