You and your buddy are fucking a babe. Your taking turns. She's riding him cowgirl. You're looking at her gaping asshole. You slide your cock into her ass. Then you feel your buddy's cock through her ass. He's pumping away. You don't have to move because he's doing al the work. His cock is grinding on yours. Then you feel it. The cum is bubbling up. You can't help it and then you cum. Not because your were fucking her, but because the feeling of your buddy's cock against yours.
