Spa day as bithday gift

Step-son brings his step-mom to a birthday surprise at Spa Day. She is definitely expecting more than just the rubdown from the masseuse and is disappointed. He is shocked because he is not expecting his stepmom to be putting the moves on him. But since they been flirting, mom assumed that he had other intentions. She doesn't want to be denied her birthday present and wants what she came to get, which is a hard, young cock in her ass.