How to tell a woman you live at home with your parents?

I have two children. One who has just been through a huge medical issue in his short life. He is fine now and is now on his way to having a normal life. I would like to start dating. I feel it is necessary for my sons sake to stay with my mom. I do pay the bills and buy most of the food for the house. It is mostly because of him that I stay with her. How do I tell a woman without her thinking I am a Mammas Boy?