Push Sarah further

"I'm going to fuck you. That will make me cum-plicit." You pinch Sarah's nipples as you tell her this.

"John..." says desperately. "You're his best friend. You're Mason's best friend."

"Has Emma told you how big I am? Do you know what you're getting yourself into?" you ask, teasing Sarah.

"Emma...?" Sarah says turning to your girlfriend after she realizes she can't reason with you.

"It's fine with me," Emma says cheerfully.

"I'm not asking for your approval, I'm asking for your help here!" Sarah says. She's unsure if she should laugh, scream, or throw herself at you.

"Emma wants to watch. She wants to watch you try to suck my dick. She wants to see me fuck you while she fingers herself." This was a bit of a gamble, as you hadn't discussed such things, with Emma, but it turned out to be correct as she started running her hands over her breasts as you spoke this.

"OK. I'll fuck you, John," Sarah finally relented. A smile escapes her mouth as she thinks about what's to come.

"Do you want me to clean up first?" she asks, knowing that she's a cum covered mess.