Getting Mommy Pregnant

My son is ready to move on with his life and move out of our home. He's growing up and thinks that's what he needs to do. I'm definitely not ready to let him go though! I don't understand why he even wants to leave. I fulfill all his needs, emotionally and sexually. Why does he want to ruin that? I go into his room and tell him I'm not ok with him leaving and makes sure he knows that if he leaves, we can't continue like this. I make sure to demonstrate everything he'll be missing by sucking and deepthroating his hard cock. Then I get on top and start riding him. I keep telling him how much I want him to cum inside me and then even tell him I want him to get me pregnant. I want him to come inside my fertile little pussy. He seems to really like the idea and cums inside me giving me exactly what I want, his cum! I know he won't leave me now. Mommy is the only one he really needs.