Over the past year, my son developed a delusion about a therapist he had - he was seeing her for a month or two as he was getting sicker, and then stopped once it was decided he need a different kind of help.
His delusion included a full relationship, with a child, etc. And, when he couldn’t see her anymore, he made up all kinds of bad things that were happening to her - he’d want to go by her office and just sit outside in the hopes of getting a glimpse of her to make sure she was OK.
I really, really don’t think he would have hurt her or anything, but it was heartbreaking to watch him and listen to him - and he was honestly and quite literally heartbroken over her.
He’s on better meds now. He’ll mention her sometimes, but not in the same way.
Sorry - no advice. I just wanted to let you know he’s not the only one who has that type of delusion. The only thing I can think of is that he may need his meds adjusted if he’s not sick enough to go back to the hospital. That’s all they’ll do anyway.