I have to cry B.S. on your mother-in-law. Anyone exercising the slightest bit of caution whilst sitting kilted can very easily keep things modest. Let's face it, kilts are NOT miniskirts. If you say you are careful about this then you are not going to show anything. This seems to be a case of D-R-A-M-A. I hope it blows over. It's no fun to not get along with family.