Stepson's 18th birthday surprise

Today is my stepson's 18th birthday and I have a surprise for him. I know how he has been secretly lusting after stepmom all these years. And yes I did enjoy teasing him by wearing sexy lingerie and revealing clothes around the house. And even giving him flashes by bending him over in front of him to pick these ups. I've seen the type of porn he is looking at on the computer. It is lots of stepmom and boy videos. Well, now that he is officially a man it is time for me to give him what he has been wanting for so long. First I must tease him a bit more. Inviting him into my bedroom I waste no time in explaining what is going to happen and using a dildo I show him just what he and stepmom are going to do.