My Step-Son Has to Watch His Bully Make Me His Slut

So I have always known about my step-son's bully. This guy has absolutely destroyed him all through their schooling together. Pushing him into lockers, tripping him walking down the hall, taunting him in the gym showers for how tiny his cock is. The more he have pushed the bar on the extent of his bullying, the more the rest of the school has joined in. He is literally a pariah at this point. What does he do? Like any little beta bitch boy would, he complains to his step-mommy. I , however, absolutely despises what a pussy of a spawn he has become; and offers no consoling or empathy. Instead, I demand to call him over to our house to "talk." She shows up expecting to arrive and get his ass chewed, only to find me waiting for him in slutty lingerie, stockings, and heels. He comes to find out his step-mommy actually wants him to bully him MORE, and not only that she wants him to make her his SLUT. To top it all off, I want my step-SON to watch the entire thing (which he does). As he is made to watch his step-mommy suck and fuck the bully like the whore I am, his tiny little dick gets hard, and we take turns berating him. The worse we are to him, the wetter I get. Eventually I cum all over the bully's hard cock while staring my step-SON dead in the eyes, and then his bully blows the biggest load of my life all over my slutty little MILF face. I agree to be his slut whenever he wants, as long as he continue to ruin my step-SON's life. I just made the BEST deal.