Blonde mother with big tits in pink lingerie rides her lover's phallus

What a horror, how is it possible, I had to return home from school at the wrong time and hear moans and sighs in the bedroom. But my father is not at home, he is on a business trip. I open the door, and there is horror and real adultery. My stepmother made me watch her fucking her lover so that I could appreciate her curves and she made me a promise that I could fuck her later too. Here I stand and think why I need all this!