Years. I have no trouble maintaining only the desired people inside my home.
I will admit that when my house was being renovated I got tired of those people being here. The noise from the air thing nearly drove me batty. I looked forward to weekends no matter how hard it was to live here. Thank goodness my bedroom and bath had already been renovated when I contracted for the rest of the house. I had a refuge.
2014. My husband's mistress stayed with us a few months after her husband threw her out. Actually OK for a while but then she started trying to throw her weight around in my house! And I made him ask her to leave.