I once tried to explain Warcraft Lore to my girlfriend, I could see she was interested but I knew more than half of it didn't stick.
I'm extremely lucky in that area, she lets me game, and read my comics and salivate over newly release games, books, comics, etc. I once was on a 8-hour-long Civ III marathon and she didn't bother me much, except to cook and help her with quick stuff, and she was entitled to do it, she could've done a "Mom" move and bother me until I helped her.
Unfortunetly I still haven't convinced her to take up games.
Although we played on my brother's Wii once, she beat me at almost every single game...