I would actually advise you to wear the kilt when you go to visit, and show her very plainly that you are comfortable and feel very masculine while wearing a kilt. Altering your habits of dressing and such to meet her "expectations" would just confirm her incorrect assumption that wearing a kilt is crossdressing, not normal, etc. Don't get me wrong, I'm not advising you to be brash and insolent, but rather change her opinion by your own example of how stylish and masculine a garment the kilt can be...Hope this helps, and good luck!