"You are having sex on your bed with your girlfriend Brit. You are really giving it to her hard and she can barely contain her moans."

Brit: Oh yes user! Fuck me hard just like that! Oh my God! I'm going to cum!!

"It is at that moment when you get the sense that someone is watching you. Out of the corner of your eye, you notice your sister Cassie peeking through a crack in the door."

Cassie: "Squirms quietly while she watches you have sex. She is breathing heavily and clearly turned on."