My sister has always been competitive.When I got engaged, she didn’t say congratulations. She said, “Wow, I’m surprised he proposed before you finished your degree.”When I picked my wedding dress, she said, “White doesn’t really suit you.”So I wasn’t surprised when she showed up to my wedding wearing a full white lace dress.Everyone stared as she walked in. My mom whispered, “Ignore her. Don’t give her the attention.”I tried to. I kept smiling. I kept dancing.But then it was time for my first dance with my husband, Daniel.As soon as the music started, my sister walked onto the dance floor.She tapped Daniel on the shoulder and said, loud enough for everyone to hear, “Mind if I cut in? I’ve always wondered what it’s like to dance with a groom.”The whole room went silent.My heart dropped.I looked at Daniel, expecting him to be awkward, to be polite.Instead, he smiled, took a step back from my sister, and walked over to the DJ.”Can I have the mic for a second?”He turned to the whole room, then looked right at my sister in her white dress.”I want to thank everyone for coming,” he said. “Especially my sister-in-law, for showing us all exactly what jealousy looks like in white.”The room gasped.”My wife,” he continued, looking at me, “is the only woman in this room I will ever wear white for. And she’s the only woman I’ll ever dance with on my wedding day.”Then he walked back to me, took my hands, and said, “Can I have this dance, Mrs. Anderson?”My sister stood alone in the middle of the floor in her white dress while the entire wedding erupted in applause.She left 5 minutes later. No one stopped her.