Caught in the act of fucking my sister's friend in the backyard

A young couple is enjoying some private time in the backyard when they are caught in the act by the sister of the guy. The sister is understandably upset and demands that they stop. However, the guy is not deterred and continues to pleasure his girlfriend. The sister threatens to call the cops if they don't stop, but the guy doesn't care. He continues to fuck his girlfriend from behind while she is bent over. The sister can't believe what she is seeing and starts to get turned on. She joins in on the fun and starts to give the guy a blowjob while her sister watches. The guy then fucks his girlfriend in a hardcore cowgirl position, while the sister continues to watch. The couple eventually switches to a more traditional riding position and continues to have sex until they both reach orgasm.