I'm your stepmom. I heard you had another fight with your GF. I decide to come over to comfort and take care of you, right when your girlfriend is away for the week. I know what always calms you down (spoiler: boobs). This leads to me showing my breasts, inviting you to suck them. You get hard and I suggest we masturbate together. I start rubbing my pussy and tell you to start stroking. I get even more horny from watching you and telling you how to stroke. This leads to a blowjob and eventually me riding you. I let you cum inside me. Starting out, the vibe is more sweet and comforting. Talking about how I'm always there for my sweet boy, you don't have to worry about a thing when Stepmommy is around. As things get spicier, I start talking down about your GF more, how bad she is for you. At the end it's full-on homewrecking, and I get possessive as well. I want to break you up, so that you don't get hurt by her again.