I can relate to her experience. I don't know exactly how Amy and I wound up as followers of Christ. I remember one conversation back around when we were married where we agreed it would threaten our marriage if one of us "went Christian" on the other. Then three years ago, on June 21, just what we had talked about happened. And yes, it did rock our marriage, but after a few months, we decided to follow Christ together.
Yet even though I don't know all the details of God's call, I definitely know that God was calling me. A lot of little things occured, starting with the pangs of conscience accompanying the things I did to weaken our marriage, but also a realization that what a lot of Christians said started to make sense to me. Over a period of about three years, I actually started to believe that God's judgments are "true and righteous altogether". Yet I continued to resist, hanging onto the thought "I can't give this up". God said over and over to me, "Why not give it up? It's worthless. Let it go, I'm all you need." One day, I stopped fighting, believed in Him, cleaned up my house, and felt a huge weight lifted off my soul.