DEAR ABBY: I have a wonderful mother-in-law whom I love very much. She frequently stays overnight in my home. I also have two young sons. My mother-in-law recently mentioned to me that she doesn’t wear underwear to bed and never has, including while staying at my house. I’m troubled by this because she wears nightgowns to bed, and I’m afraid my sons might accidentally see her lady parts. Also, she sleeps on my furniture like this, and I feel it is disrespectful and unladylike. I don’t know how to say to her that, for the sake of my furniture and ...