DEAR ABBY: My mother-in-law owns the building my husband and I live in. I moved in with him about a year ago, before we were married. Because she owns the building, she doesn’t charge her son rent to live there but asks that he help manage the building, which takes about three hours a month. (He has a full-time job outside of managing the building.) When I moved in, his mom asked that I pay rent. I guess in the back of my mind I thought it would change after we got married. Do you think I’m a brat for ...