My [33F] husband’s [30M] friend [26?M] had a psychotic break and needs constant supervision. Friend’s mom wants him to sleepover frequently.

Up until about 6 or 7 months ago, my husband’s friend Luke was totally healthy. He was going through a pretty rough time and had a psychotic break, which involved delusions, paranoia, and hallucinations of people following him and shooting at him. Ever since, Luke’s been hospitalized several times and pretty heavily medicated, but he’s still pretty unstable. Because of his anxiety and hallucinations, he’s not able to be alone, so his mom has been his primary caregiver.
For the past 6 weeks or so, Luke has been wanting to get out of the house and our place is the only place he feels safe. I’m all for him coming and hanging out but now he and his mom want him to start spending nights over here. I wouldn’t mind this so much either but Luke doesn’t sleep through the night. He wakes me and my husband up several times a night to go check on noises or see if the door is locked. I put a rule in place that there are no more weekday sleepovers because I have to be able to sleep for work the next day. Everyone’s been pretty respectful of that, but my husband initially made me feel like I was overreacting and being dramatic about the whole thing.
Today, my husband calls from work and says that Luke’s dad has been sick for awhile now so his mom hasn’t been able to take him over there and she hasn’t been able to go to work or run any errands. Luke’s mom is asking if he can come over for the weekend basically.
We’re childfree for a reason, I like to have my alone time and my space and I don’t want to have to shape my whole weekend around babysitting Luke last minute. My husband doesn’t care because he’s at work all weekend so it’s ‘up to me.’ He said he doesn’t have a reason to say no so I can say no and he’ll tell Luke’s mom he can’t come because I said no.
I feel like a total ******* because Luke’s our friend (mostly my husband’s friend) and I know he’s in a time of need. I’m not in the best headspace right now and have been dealing with some long term anxiety and depression myself so my alone time is really important to me so I can recharge for the week ahead. I’m torn between being a good person and helping Luke and his mom out and feeling like she’s taking advantage of us, which makes me feel guilty and selfish. I mean that’s what she signed up for when she had kids right? But then he’s our friend and he needs us right now.
I don’t know, what should I do??
Tl;dr: friend can’t be alone after a psychotic break, his mom wants him to spend the night several times a week. I want to say no but feel like an *******. What to do?
Edit to clarify: Luke’s parents are divorced and his dad has been sick with the flu, nothing too serious but he hasn’t been able to go over there for about a week.


Source.

Sounds like you've done enough....gotta start.d your ground and keep whatever boundaries you need.
If you don't do it now, they'll use you to death......which will probably come via their psychotic son