Purple Nurples

A.K.A. The Titty Twister. Dan reaches down with his free hand and grabs Kelly's nipple with his thumb and forefinger. She looks up at him and says "No..." Dan replies "Yes", and roughly twists it clockwise 180°.

Kelly starts squealing and kicking her legs, he twists her nip a little more, then starts pulling on it. "Damn, if your boobs weren't so small I could probably stretch these out more".

With that Dan lets go of the one and immediately grabs her other nip, twisting it almost full 360° and pulling on it even harder. Kelly screams, and suddenly they hear the door open behind them.