DEAR ABBY: My husband and I have a friend, “George,” who rents our upstairs. Our home is large, and the second floor has all the amenities of a 2,500-square-foot house. He has his separate entrance and never has to come through our living space. In the beginning, I agreed to the arrangement because he was going through a divorce and needed a place to live. Now, for the past several months, his ex has been spending nights upstairs. We just celebrated the holidays, and his family was here together. I’m feeling very confused and uncomfortable having them both up there. Now ...