Fighting her on it will go nowhere. The best thing I did was to go to a kilt night and tell her the good times you had with wearing it. Tell about some of the comments, even the funny "I wasn't sure which restroom you were going in". All of it is in good nature. Second, I dressed in a Prince Charlie to a church event that I had to speak at (name any event you could go to) but that is a formal look and (not to brag), I looked quite stunning in the whole kilt and formal jacket. So much, some of her friends commented quite well about it. She was always stand offish with it and did call it a skirt quite often. However, now her point of view is different and would like to go with me the next time we have a kilt night.