Son comes home early from school hears weird noises coming from moms room, catches her fucking one of his friends. Realizing she's been caught, mom is mortified, goes to cover herself up, apologizing. Son gets hard and initially mom is shocked and feigns disgust, but deep down she knows this is a fantasy for her she just needs to gauge how serious her son is and how far she can take it. After acting conflicted she offers to let him masturbate while watching her fuck his friend, and over time mom is giving more and more attention to her son and the boy fucking her becomes an afterthought. As the son is right at the edge mom stops and asks where he wants to cum. On my face, my tits or... She opens her legs to offer her pussy and as she is mid sentence trying to entice him, he enters without needing to be persuaded. Son releases inside almost immediately, mom assures him it's nothing to be embarrassed about and that he will last longer next time. Mom feels a him start to stiffen slightly at the words "next time" and she is able to coax a proper fuck out of her boy by explaining how there's no going back for them now and all the filthy details of how they will be having sex constantly, ending in another creampie.