Lily watches her step-son, Nathan, works out outside. As she does, her hand slides over her giant tits and starts rubbing her tight pussy through her loose yoga pants. Her daughter, Alison, catches her. Lily claims she wasn’t masturbating to her step son. Alison smiles, and says, then you wouldn’t mind if I fuck him. Lily storms off in anger. Alison doesn’t miss any chance to annoy her mom. She pulls Nathan into her room and throws him on the bed. She takes out his cock and gets is nice and soaked with spit before she climbs atop him and works his cock with her pussy. Hearing what is happening, Lily stands right outside Alison’s open bedroom door. She pulls out her immense, tattooed tits and starts playing with her nipples as she catches glimpses of Nathan naked and images him fucking her. She even starts rubbing her pussy as she imagines her step son pounding her the way he is pounding his step sister. Just as Nathan explodes all over Alison’s ass, Lily has her own, quiet orgasm, just outside the door.