Mommy come's into your room for an important discussion. You told her you would do anything to make her happy. Well there is only one thing she really really wants. A little sibling for you. She's desperate to be pregnant again...and she wants you to be the father. Mommy convinces you to breed her and fill her with your baby. Imagine how she'll look round with your child, tits bursting milk. You can't resist and fuck her and fill her with your seed. She tells you you'll need to fuck her again tomorrow just to be sure as shes super fertile right now.