I'm not sure of the best way to tell you this, so I'm just going to have to come out with it.... StpMummy is pregnant and... it's yours. I know for a fact because your StpFather and I have been trying for years and then we have sex that ONE time and boom... I'm pregnant. Your StpFather can never ever find out about this, we have to keep it our secret. But that's not all that I wanted to tell you, well since I got pregnant I have been having these really powerful urges. I don't think that anyone else can satisfy them apart from you StpSon. Will you fuck your StpMommy again?