Maybe all she wants is for you to acknowledge this and to talk to her about it... (and wear pants when she goes to the doc! )
Exactly! There's nothing she can do about other people's reactions and rudeness and I'm sure she doesn't want to limit your type of clothing, but, an acknowledgment about the issue and maybe if it happens again, deflect some of the attention onto her by saying things like: You know, if it wasn't for the support of my wife (give her a big hug when you say it) I wouldn't be wearing this kilt at all!