The young friend of the sleeping girl pretended... to join in the incest between brother and sister.

Nikki is about to watch a movie and go to bed, but his stepsister changes his plans a little when she comes home with her new girlfriend. The guy gets turned on and wants sex, which he tells his sister, but she doesn't respond because she's sleeping in the same bed with her friend. Nikki quietly sneaks up to her and lets her suck his dick while her friend sleeps next to them... but she's not asleep, and she wants to fuck too.