Pure Taboo - Kenna James & Dee Williams

Kate and Trevor (Kenna James and Alex Mack), a married couple, are paying a visit to Trevor's stepmom, Leslie (Dee Williams). They had called Leslie ahead of time to make sure she was home, letting her know that they have something important they need to talk with her about. And when Leslie opens the door to greet them, it's clear that there's something troubling weighing on their minds.
Leslie tries to keep things pleasant, offering for them to join her in the living room and share their news. Kate takes the lead, tentatively explaining to Leslie that, unfortunately, Trevor hasn't been able to finish with her during intercourse, making their attempts at having a family in vain. Leslie is shocked to hear this but tries to remain supportive of her stepson and his wife. After all, this is quite a difficult thing to have to deal with for a newly married couple...
But when Kate explains WHY Trevor can't finish, Leslie is even more shocked and embarrassed. It's revealed that Trevor and Leslie had a taboo relationship when Trevor was a younger man, something that Trevor had kept a secret from Kate until these problems surfaced. Ever since that relationship, Trevor has never been able to cum with anyone else- something he's secretly resented his stepmom for. However, Kate and Trevor have thought of a way for Leslie to right her wrongs... by helping Trevor cum right now as he and Kate fuck in front of her.
Leslie is shocked and flustered... but her guilt is too much for her to ignore. She agrees to stay by their side as they make love in the living room, touching and motivating Trevor throughout so that he can finally impregnate Kate. But will this be enough for Trevor and Kate to ultimately forgive her?