Peter's girlfriend Gracie and stepsister Mackenzie catch him jerking off in his room. Instead of freaking out, they join in, with Gracie taking Peter's cock in her mouth while Mackenzie plays with her own pussy. The girls swap places, each savoring Peter's thickness. Mackenzie, feeling daring, pushes her tight teen pussy onto Peter, riding him reverse-cowgirl as Gracie watches, jealous. She soon joins in, and the trio enjoys a steamy, forbidden threesome.