Stepmommy knows your taboo secret

Since my husband is out of town, I don't mind entertaining my stepson for his birthday. While he is tending to himself, I notice his computer is open. Feeling a little nosy, I take a look at what he has going on with college. Instead I find his porn stash full of taboo videos and pictures! I have to admit, I like what I see and feel a strong urge to touch myself seeing the stepmom and stepson videos. I decide to invite him to go out for some fun with me. After our nice night out we come back and I walk into his room to find him relaxing in nothing but his boxers. Trying to think of things to do to make his birthday memorable, I offer to make myself more comfortable as well. Once I strip down to my bra and panties, I notice the raging boner he is showing. I can't resist sliding my hands underneath to get a feel. He takes his boxers off so I can better stroke his cock.