Our situation is two-fold. Mom is elderly and has my 50 year old Downs Syndrome Brother living with her. Since Dad passed away, it has been just the two of them. She has resisted all of our efforts to convince her to even look at an assisted living situation as well as to consider moving my brother to a group home. She has stated repeatedly that she wants him with her saying that it would be traumatic for him to move out. She won't even consider how traumatic it would be to him to find her injured or worse and THEN have to move out.
She'll ask him leading questions to make sure that he answers the way she wants him to.
When she had a fall and was hospitalized for over a week, our sons and nephews helped us taking turns staying with him and getting him to do various activities, go to bed and get up at a reasonable hour - all of which Mom has repealed and gone back to allowing him to go to bed and get up when he wants and watch TV literally all day except when he's eating.