@melisawilson,
An interesting question. My experience with my wife is this. When we got married 17 years ago, she wasn't very religious at all. Neither was I. Since then I have became a Buddhist. She wasn't interested and that was ok. She had a life changing experience two years ago and 'found Jesus'. I didn't share that experience. Since then she goes to church every week, sometimes twice, and does volunteer work on the weekend, which I sometimes help with. It has been a very good thing for her. She accepts that I don't share her beliefs. I am still a Buddhist and do practice it. At first I had some difficulty with her sudden conversion, but I have come to realize that it is not that unusual for people to find Christ in a moment of life change. I also have come to understand that it's not my place to question her belief nor her mine. I respect her decision and that means that I don't question her or belittle her. We have gotten to the point that we get along very well. Probably better than ever. We both practice our religions and accept the other's position.
As a Buddhist and after discussion with other Buddhist's, including the Buddhist nun that leads our local group, her thoughts and beliefs do not affect me or my way of thinking. I should respect all others and their beliefs and not question them. That's doesn't mean I have to agree. What counts for me is the way I see the world and how I relate to it, avoiding my own generated confusion and judgment.
She is very happy in her new found beliefs and I am happy for her.
Now if she continually tried to convert me or didn't show any respect for my views, that would obviously be more difficult.