text: Is it possible he lives with his mom because she is in ill health and he looks out for her?  Or, she can't afford that house on her own but wants to stay since all her memories are there?\n\nThere are many reasons that an adult son stays at home.  Until you know and we know what those reasons are, how can we judge what he is doing?  Have you ever talked to him about it?\n\nWhy don't you get the entire story before you try to make waves?  That is what a mature, responsible person would do.