step-Brother step-Sister Jerk Off Instructions

What do you mean "are you going to go out like that" duhhhhh of course I am! And you're my step-Brother, you can't tell me what to wear!! Wait a second, do you have a hard on???? Oh my god, ewwwwww! step-Brother!!! That is disgusting!!!! Is this why you didn't want me to wear this top?? That is soooo wrong, but we are going to have to get rid of it somehow!! Maybe I can tell you what to do, if that's the fastest way to make it go away!! But we cannot get caught doing this - I'm your step-Sister :O