Your sister comes into your room, sits across from you, and spreads her legs. She proceeds to tell you about her dirty, sick fantasy of you and dad stroking each others cocks watching her play with her wet pussy. It is so wrong, but she loves thinking about you and dad getting each other off being made to watch your sister and his daughter fuck her pussy. Better yet, she'd love to be gangbanged right in front of you two, making dad suck his daughters juices off of their cocks and their cum right out of her pussy, while you stroke your dad's cock. She wants to make both of you cum over and over and over, until she says it is okay to stop. Doesn't that sound fun, bro?