I've cooled down a lot since I first got into it. I'm pretty much just a "casual scot" nowadays; I've developed other interests and picked up older ones that I forgot during my obsession, so yeah, it's not me overwhelming her.
I do understand how my dad's obsession, especially seeing as how it's very recent and was never a part of their life beforehand, could be very overwhelming to my mom. I casually encourage her to get involved too, without pushing. I think what really turns her off is that in his enthusiasm, my dad forgets that my mom used to be wild and crazy about heritage study and period-themed fairs before they were even together. So yeah, as some of you said, I know she probably feels left out.
David, the "honeymoon" phase actually hits the nail right on the head. I'm sure he'll calm down after a little while, but at this point in time, it's stressful seeing them argue so much, especially considering I still live at home and can get cought in the middle of it sometimes!
My mom is trying; just the other day she said, all on her own, that she'd be interested in making some celtic-themed crafts and selling them at rennaissance fairs or the highland games. So it could be that it's drawing to a close. What's got me stressed is that you can really feel the tension in the air, and it's got all of us kids still at home in a tizzy.
But yeah, I'm sure they'll work it out. I just wanted to hear the wise words of my fellow kilties on the matter. Thanks everyone.
Ian, if for whatever reason I do sell 'em, I'll let you know.