Your sister gets home from work and walks in on you jerking off in the kitchen... gross! You continue to touch yourself even through she's standing right there. She insults you and tries to humiliate you before threatening to tell mom. What are you gonna do about it? Keep touching your pathetic little dick? She makes you keep touching yourself and insists that you're doing it wrong and look stupid. She tells you the right way to do it and watches you the whole time. What kind of loser gets off on his own sister? She makes you continue until you're ready to cum and instructs you to cum all over your own face. Sit tight so she can take a photo of you... now she can always get whatever she wants.