Dear Prudence,
My sister has never had a romantic relationship that ended well. Most recently I objected to her dating my fiancée’s brother, but she told me it was none of my business. A month before my wedding, they broke up spectacularly. I really don’t care who cheated or who got drunk with whom—I am tired of it spilling over into my life. My brother-in-law has been very quiet and personally apologized to me. My sister got drunk at my bridal shower and picked a fight with my sisters-in-law. My mother and I laid down the law; my sister sulked. She burst into tears and said that we didn’t care about her broken heart. I am ready to tear my hair out. My mom tells me to give my sister “time.” But she only dated him for three months. I have been planning my wedding for three years! We are paying for everything ourselves. My sister and brother-in-law are both in the wedding party. Can I just ban my sister for my peace of mind?
—Bridesmaid Brouhaha