She came through like a champ. I love these phony single bed scenarios. She did everything except rub her pussy on his pillowcase to get him interested. They could have gotten a lot closer if he had let that lot go and marinate inside her.
Wow, what a fabulous step mother. Her nudity around the room was an nice invitation to her stepson and once they were in bed, him masturbating is also a clear message to stepmom. Presumably they don't bother revealing their sex to the husband/father.