I'd be more inclined not to overdo the "All things Scottish" theme. Sure they may be underlying issues, but not to the exclusion of your mother's heritage. Celebrate hers also. Don't throw your kilts away (I wear a 36W, 22L BTW, just in case).

If it becomes an obsession I'm sure it would bother anyone if harped upon all the time. Kilts are going to be more acceptable than a toga, but what if you had a Italian friend that wore one everyday and constantly spoke about Roman culture all the time and hammered it into every conversation?

Consider dear Mom. Maybe she feels like an outsider now rather than a wife and mother.