I sit on the couch, on top of my side piece, Mark's lap as I grind on him. I don't even bother trying to hide it as my girlfriend sits on the other couch. He layed flat as I arched my back, my hands on his shoulders as he thrusts me. I moan as he grunts. I knew my girlfriend was being ripped apart piece by piece watching this, but I didn't care. In fact, it got me off even more. I continue with him before looking at her, my movements not slowing. "What? Got something to say, slut?" I snark. "No.." She responds. I saw how she looked hurt as hell. I was probably breaking her by doing this. Her heart. "Make us dinner, why won't you?" I grunt