@Laura2592 I haven't experienced this with my own family, but they also know that we don't outsource the cleaning for our home.
Unfortunately, a lot of people seem to believe that if there's a housekeeper on the payroll, then anything goes when it comes to the mess - even if the scope of that mess is way beyond their pay grade. And even more common is the delusion that staying at someone's house for "free" has no negative cost to the host, in spite of all the cleaning, utility use, lost profit opportunity, and even damage. Whenever someone talks about offering their home to someone for free, I think about how what they're really doing is paying them out of pocket to occupy the home.
I wouldn't charge relatives a rental fee if they were coming to visit me in my own home, but if they are availing themselves of your place of business I think it's perfectly fair to treat them as customers and set the same prices and rules you have for your normal guests. They are free, of course, to avoid the entanglements of family and business by staying elsewhere when they visit your area - which clearly would have been the better choice in this case.