My 25-year-old niece is getting married in four months. Five years ago, she lost her father in a tragic accident while her parents were on vacation. Since that time, she has come out as gay and grown closer to me than to her mom (my sister).

My sister recently remarried and plans to move to another state with her new husband prior to the wedding. My niece has asked me to walk her down the aisle along with my sister. My sister said it’s disrespectful to her since she is the mother.