Wow, this is't a typical Q you hear on a daily basis. There are so many questions drawn from one short sentence.
When you say "sleeping" do you mean sleeping as in zzzzz or sleeping as in incest?
What are the other factors surrounding the situation? Are there some kind of strange valid factors? Like some kind of circumstance which has occurred and now they only have 1 room? If the answers no, I would think that he has some deep rooted attachment or abandonment psychological issues which he needs to address.
Thank you for sharing such a fascinating Q.
P.S. out of curiosity, I have to ask, are you the son, mum or neither? Sorry if it's intrusive to ask.