Mother miscarriged her 5-6 weeks old (fetus) baby and she afraid to tell this to her husband. She asks stepson to help her in getting pregnant again. He staggered back confused and unsure what to do but stepmom managed to brainwashed his mind and convince him to commit the incest sin.
Stepson felt a moment of pity for his poor mother but become a little dominant later with the stepmom-son relationship. He just thumped up his grown-up cock deep inside mommy's womb and fucked her until She felt large erection pushing inside her pussy folds.