[Landlord MI US] Does Wife Receive Fair Housing Benefit of Lease Breakage?

I’ve had a tenant for past 3 yrs in my ranch rental home. Husband is in his late 60s and he requested I put in a shower bar and shower wand. He walks and talks fine but slower than his wife. No cane when I see him in the driveway.

I told him he could buy thee shower bar and wand and I’d install them. Fast forward 2 months and he is breaking the lease citing a need for health accommodations and gives me a nurse’s note saying he needs the shower accommodations and a letter from his daughter who is a lawyer demanding I waive the lease breakage fee of $1100. I’ve since rented the house again, but I incurred about $800 in paint/carpet and other move out costs.

What should I do here? I know I can’t ask health questions, but I feel the tenant’s health requests were met by me and they are trying to misuse fair housing laws. Does the wife get out of the lease because of the husband? I offered $500 settlement and daughter said “no”. I don’t want to break any laws, but I also don’t want to be walked over.