I have a DB who is 27 and still lives at home with my mum. DB was diagnosed with having Aspergers as a teenager but my DM has never accepted the diagnosis. She is basically in denial and pretends there is nothing wrong with DB. DB doesn't work and usually stays at home all day. DB is socially inept, has no friends or girlfriend, and he spends most of the day playing computer games that my mum buys for him. He has said to me that it isn't worth trying to get a job because no one would consider giving him one. My DM pays all the bills including all of DB's clothes and food. DB doesn't financially contribute anything to my DM as he has no income. I don't know what DB's exact daily routine is as it has now been 4 years since I left home. The impression I get from speaking to my DM is that little has changed since I was still living at home. He is constantly shutting all the blinds and curtains and walks around the house several times a day making sure all the doors and windows are locked. He washes his hands after touching any door handles or opening any letters. He's excessively sensitive to loud noises, bright lights and smells. My DM has to be careful with the cleaning products she uses as if DB doesn't like the smell of them, it sets him off. DB is also very set in his ways and can't cope with the smallest change or any disruption to his routine- he gets agitated if any furniture gets moved around, or if food isn't in the exact same place in the fridge for example. I can see the strain etched on DM's face whenever I see her and I have no doubt that the pressure of looking after DB is the cause of it. She never gets a break. I think the last time she went on holiday was about 8 years ago. She desperately needs one but she says she can't go because she won't leave DB at home on his own in case anything happens.
No one else in the family knows about the situation except for me, DB and my DM. I think my DM enables DB by coddling him and not setting any rules or expectations on him. I understand this next part might sound a bit cold-hearted, but I'm worried about possibly being lumbered with DB when my mum dies. When that happens I will be DB's next of kin. He wouldn't be able to look after himself as he has no adult life skills. I will most likely have my own family and kids by that point and even if I don't, I wouldn't want to look after DB. I would assume that he would get evicted from the house as he wouldn't be able to keep up with mortgage repayments or household bills. He would have to go into a care home. I have no idea how that would work or how much it would cost as my mum won't discuss it with me. She gets upset if I mention it to her. I want to ask if anyone on MN has experience of similar situations where a dependent adult relative is still living at home. Did the situation ever get resolved? Is there any advice I should pass along to my mum?