My DS, Aspergers and chronic deptession, has tried non-stop to find a job, with no success. He spent 4 years in care 6=9 and then spent the next 7 years with MIL. When he left school, he moved in with us and his room, formerly our home office, became a tip. Every so often, we go through a bit of a declutter, but he'll never be tidy, try as I may. But he supports me with caring for my DH and Grandma, and he's the most loving, adorable son you could hope for (OK, so apart from the state of his room - it's his room, he does have problems with personal care issues, but given reminders and help, he accepts the advice). I don't want him to become one of those revolting live-at home 40-ish mummy's boys, but will miss him dreadfully when he does move out. Maybe your DH feels the same way about his son. If you can't live with your men, maybe you should be the one to move out. Sorry, but maybe your stepson has mental health or other problems, and needs just a bit of love, understanding and support,which it sounds like he's getting from his dad.