Hi Desperate, welcome to Psych Central. Sounds like you have a big role as a caregiver.

If you are dealing with someone that respects rules and abides by them, house rules are helpful.

If you are dealing with someone that hears you now and says yes then proceeds to break the rules in an hour, you might need to consider other options. A post office box or locked mailbox means only you collect mail.

Locks on private rooms could prevent inappropriate entry.

Rules about taking her meds and going to therapy as the grounds for living there are essential.