Is your S paying you some rent? If not it might at least be a good idea to ask him to pitch in for utilities/ groceries. You can phrase it as needing his help w/ them now that there are two of you there -- maybe letting him know he's needed and showing confidence he can help you out in small ways would improve his self-esteem? Also it might flush out any job/ salary issues he may be hiding. And this is the time (earlly on) to set boundaries -- don't let him start relying on you to pick up after him and do all the laundry, for instance -- or he'll NEVER leave!
