You feel his hand on your ass

You stiffen a little as you feel Jack's hand squeezing your ass. "What are you doing?" You do not turn just yet, hoping that this was an accident. Maybe he stood and tripped a little, and your ass was the first thing he could grab for support.

"Just getting back at Stacy, John," you heard him whisper. And then you knew it was no accident. All of a sudden, your best friend's boyfriend was standing behind you, hand on your hip now, and his lap--clearly harder than it should have been--pressing into your bottom.

"My boyfriend is in the next room, you know," you say, hoping to deter him.

"He does not have to know. This can be our little secret," Jack whispered into your ear now before biting at your earlobe. You started to remember just how horny you had been as your knees wobble a little.