Zach keeps lapping at Sophia's used pussy.

Zach does not stop sucking and licking Sophia's pussy. If anything he appears to be attacking her pussy with even more vigor. He's drunk on sex doing something he never could have imagined himself doing, but enjoying it entirely. He's eating another man's cum - straight from the source he thought, but then corrected himself, straight from the source would just be from a dick, but from a pussy somehow seemed to make more sense to him. He wasn't really thinking straight, but he knew he was horny. His dick is hard as fuck as Emma strokes it.

Zach wondered how he got himself into this. He's eating his girlfriend's best friend's boyfriend's cum out of his girlfriend's pussy while his girlfriend's best friend gives him a hand job. The fact that Sophia is only sorta barely his girlfriend, like they hadn't really talked about such terms didn't really help. What a mind fuck, he thinks, but a really fucking hot mind fuck.