I do not know what kind of contract RLC have with their tenants, but when they are no longer a couple, they rarely interact much, and they (Maya) spends like 3 or 4 nights a week away from home, everyone can see that this is not good, for any part.
The best solution would be to move on, either close this apartment down, or replace them. That would be best for us, for RLC, and for Maya&Stephan.