Aaah!' She screams as I push the strap-on against the vibrators. I keep on pushing until the vibrators finally go apart and the rubber shaft slides in between them making Catherine's twat open even wider. She tries to rub her clit again but I grab her by the wrist and push her hand aside. 'Stop it! My cock will make you cum!' I yell and whip her across her breasts. She goes still for a second - obviously trying to understand what kind of an evil game I'm playing. 'I don't want your cock! What the fuck are you doing, get off me!' Catherine jerks under me.