This was a kinky taboo custom! My husband has been traveling for work for a couple of weeks, but he's supposed to be getting home tonight. I’m excited, and want to fuck, so I get ready. I hear footsteps approaching, and so I get on the bed, ready to fuck. The door opens, I am ready… However, it isn't my husband at the door... It’s my step-son. He can't keep his eyes off of me as he tells me that his step-dad called and said he won't be home until tomorrow. At first, I’m disappointed and frustrated, but then I notice that he has a huge boner, even bigger than his step-dad's. I decide that I can still have some fun after all... He watches eagerly, I ask him if he'd play a game with me. I’m going to tease his cock, and if he cums before me, he has to agree to be my toy. He agrees, and so I start with a blowjob, He manages to hold on, so I move on to titfucking. He's still holding out, however, so I decide to ride him to ensure I win. His step-father could never last more than a couple of minutes in me, so there's no way he'll win. I warn my him that I don't have any condoms, so he needs to warn me if he's going to cum. I start to ride him, and love how he feels inside me. Bigger, and harder than my husband, I’ll be happy to have him as my toy. Soon, I’m not concerned about the risk of him cumming inside me, I’m just enjoying fucking him. However, despite the riding, he's still holding on, and I’m getting close to cumming. I ride his cock harder, trying to take him over the edge, but this also brings me closer to an orgasm. Fortunately, the desparate teasing brings him over the edge, and he finally cums inside me. The realization that not only is my step-son my new boytoy, but he also came inside me brings me to orgasm moments later. I ask my step-son if he's excited to be step-Mommy's toy now, and smile as I feel his cock inside me. I tell him that he needs to keep this secret from his step-father, otherwise I won't be able to play games like this anymore. I feel him starting to get hard again, ready for round two. I hope my husband takes his time coming home