I have been married for over 13 years to a non-gamer. I wish she would try it, but I am glad she tolerates it at least.
She had a very sheltered upbringing with a very conservative mother. When we met, she thought gaming was evil. She also thought I was at very least an abberant personality due to my interest in the horror genre. She was never allowed to even watch Star Trek as a child, because "it had scary music." I gave up gaming when we got married (wasn't happy about 2nd Edition D&D anyway) in May 1992 and stayed away until 1998. In the meantime, I found some online resources, such as James Young's page and religioustolerance.org and convinced her to read them. She has since sat through a bunch of game sessions and realizes that it is just a bunch of guys (and occasionally a girl or two) bs'ing around a table and pretending to be something that doesn't exist. This is progress.
Now, I can talk gaming with her and she understands. She can even give feedback on gaming-related topics. Keeping in mind how far she has come, I could not ask for more.
DM