Gracie has borrowed your girlfriend's dress for a night out on the town and wants to know what you think, it is very revealing and when she moves you can see her perky boobs. You tell her that she looks better in it than her girlfriend does, Gracie decides this is the cue to start teasing you with her perky tits. She knows you are getting a hard on and instructs you to take it out and wank while your girlfriend is upstairs.