Glad at least one parent still knows how to parent! The hovering crazies, those people are making the younger generations less and less functional.
As for that mom who wouldn’t leave your house, I suggest next time something along the lines of:
“You are an idiot. Get out” (and repeat, escalating volume, until she does) You should never have to persuade or trick somebody to leave your home or leave you alone. I wouldn’t have even let her in, in the first place.