Activity for Karen

Hello everyone, I need help! I was recently at a gathering with my FH’s family. I was across the table from his sister when the wedding came up. It got around to dress somehow and she said point blank , “I don’t wear dresses. I don’t wear skirts. A...

My sister is married and she has a daughter, my niece of course. I'm thinking of asking them to be Matron of Honor (sister) and Maid of Honor (niece). Has anyone heard of this? Or done it? I have no idea if this is taboo among the wedding world.