Looking for some advice regarding family more so DB.
Background information. DB cut DM out of his life 10 years ago as she committed adultery. DB bought the house DM and DF lived in and both DF and DB lived there.
DB met a girl and after some time she moved in with DB and DF. They then had a child and got married. Fast forward to the past year DF had an accident as was hospitalised for about 4 months. DSIL then announced that she and DB were getting a divorce and she moved out with DN. DB sold the house without having living arrangements so ended up moving in with DF at assisted living. After a few long months DB finally got a place but is a good 45 mins away. He then began to drag his heals about moving out of where DF lives and it was affecting DF mental health and wanted his space back. Then DF and DB had an argument about him not moving out and they haven't seen or spoken to each other since.
Now SIL has told me she is concerned about DB mental health and wellbeing, I've reached out to DB numerous times and have been left on read.
I'm not sure how to help DB if he won't respond. He has also told her lies that we refused to help him move into new place and has told her we shut him out when we visited DF when he was living there and wont be making effort to talk to us as a result, which is untrue also as we would have more of a conversation with him than DF as he would sit in silence. DB would also message me most days about random stuff and advice.
So what the hell do I do?