Marge has a shower

Marge quickly slipped upstairs to the bathroom. As soon as she entered she saw Bart in the shower jerking his cock. As soon as Bart saw his mother he froze half-way through a wank. At the sight of her son's erection Marge became excited. She fell to her knees and took his cock in her mouth and started to suck it. Bart was already close to cumming and blew his load into his mother's mouth and she swallowed his entire load. Marge kept sucking and Bart stayed hard. Marge soon moved Bart out of the shower and had him lay on a towel flat on his back in the bath room and she quickly mounted his cock and road him. Bart lasted quite a while and as he cummed in her pussy Marge managed an orgasm. As marge got up off of Bart she looked at the door way and saw Lisa standing there watching them. Marge asked Lisa why she was smiling and Lisa told her that if it was alright for her to screw Bart then it did not matter about her screwing Homer.