Just remember man, there are most likely more circumstances than that. Dont think of it as living on welfare than with you. His mom is most likely guild tripping him/offering him something that you can't give. Like my mothers boyfriend's son lives with his mom because she promised to kick her bf out if he lived with her and he hated him. He loves his dad but the reason he moved in with his mom is because the guy she was with wasn't good for her.