It may take time to condition her to the idea, but I'm sure she'll come to be proud of you, especially once you get the sporran and belt. My wife was the exact opposite as she already knew men who wore kilts through her Scottish Country Dancing and her Country Holiday fellowship and I was the phillistine who had never donned a kilt and wouldn't even get married in one. Indeed we were married about five years before she finally encouraged me to wear a kilt for the first time. Now I have 15 kilts and wear them almost every day - wearing trousers is now a rare event for me.