Hell, I'd hardly call my mom metal, but I actually got her into Metallica...no small feat, considering she gave up on rock 'n' roll before the Beatles even started going weird.
She took me to my first gig (Metallica in Aug. '94, probably the last tour they did with long hair)...and when I couldn't get any of my friends to go with me, she ended up using my second ticket herself...and loving the show.
Good thing she let me go off on my own for the whole show, but that's another story.