I walk into my step-son's room and find him masturbating. What have I told him about that? No masturbating without step-Mommy. This little cock belongs to step-Mommy. Well, time to pull my step-son's cock back out. He started it, so we might as well finish it. I stroke his cock for a while, then I get on my knees. I suck on his cock and his little balls. He loves it when I suck on his little balls. I feel him getting close to cumming. I tell him to cum all over his step-Mommy. His cum belongs to step-Mommy, so be sure to get it all over step-Mommy's titties, and be sure to get some on step-Mommy's face too. He lets go of a huge load all over step-Mommy. Time to clean up before step-Daddy finds us. After a couple of days, I can see that my step-son needs to cum. His step-daddy is in the office and won't bother us for a while. I want my step-son to feed me his cum at the kitchen table. I pull out his cock and tell him to stroke it for me. step-Mommy wants to see him stroke it. I get on my knees and get ready for my step-son to cum all over step-Mommy's big titties and face. His little cock, balls, and cum belong to step-Mommy. I can feel his little balls about to explode, and he lets go of all his cum, dripping down step-Mommy's nipples. I love having his cum all over me throughout the day, knowing that I will be talking to his step-daddy. The next day, my step-son comes up to me. Something is wrong. Oh, he's horny. Well, I have him go ahead and pull his little cock out while I bend over him. I pull out my titties so he can touch them while I rub his little cock. Mmm, he loves it when step-Mommy touches him. I get on my knees and remind him that his cock and his cum belong to step-Mommy and step-Mommy only. This is our little secret. He cums all over step-Mommy's face and big titties. I can tell he's feeling much better as I rub his cum into my titties. I tell him that this is what step-Mommies are for.