Spank that ass

As you continue fondling her, you feel an irresistible urge come over you. You lift your right hand away from her ass and bring it down in a swat on her left ass-cheek.

*Smack*

Lin jerks away from you and freezes up. "Oww! Why did you do that, John?" she asks, her eyes starting to tear up. She's starting to close off, shifting off of your lap and away from you on the couch.