Grew up with her only, as she and Dad got divorced when I was a baby; as soon as I could focus, she had a Bible in front of me, reading to me, going over picture books, etc.
We were staunch Evangelicals, attending the SB Church due to its emphasis on fidelity to Scripture above all else. We were very close while I was growing up, in large part due to our faith being THE central -- at times, perhaps the only -- part of our lives.
We were convinced that all who did not confess Jesus as Lord and believe in their hearts that God raised Him from the dead, and who did not ask Him to forgive them of their sins were going to go to hell forever, period. We therefore shared our faith with everyone who would listen, though not in a particularly pushy way (well, I was more than she was, truthfully). It was this missionary zeal that was a common bond, since many people at our work/school, and even in our own family at the time, seemed to be in such opposition to our way of thinking.
So I convert to the Orthodox faith while attending (of all things) a non-denominational, charismatic university (Oral Roberts U, for anyone who knows of it). Mom had been thrilled I was going there, even though our church had never emphasized "gifts of the Spirit," because, well, "they believe that Jesus is the Son of God and the only way to get to heaven," so they were all right.
When I came to her and told her that I was going to change to a faith with priests, icons, confession, ritual, lack of "eternal security," lack of blind support for the State of Israel, reluctance to condemn as "of the devil" certain things in society, and other such indicators of "man-made, dead religion," she took it very personally, turning on me in much the same manner we had turned on other family members in the past, going out of her way while at family get-togethers to badmouth me and/or (usually "and") Orthodoxy.
I confronted her about it (in private, at her apartment) after things came to a head, and we cleared the air, thank God. She said she felt as though I had rejected everything she had instilled (or, as she saw it, tried and failed to instill) in me as a child. I told her that I was and always would be so grateful[/u] for all she had done for me, and that, had I not been raised to actually GIVE a rip about things having to do with God, faith, salvation, Scripture, etc., I wouldn't have ever felt the NEED to convert! My conversion to Orthodoxy was actually something that VALIDATED her rearing of me! She was the one who gave me my initial vision of Christ and, though some things had changed, been added on, and taken away, SHE received much of the credit for having so diligently raised such a "spiritually conscientious" young man, I guess you could say. (On a side note, my current Archbishop (+DMITRI) has much the same story: Baptist mother, gratitude, etc.)
This was a very teary moment for both of us, and she very much appreciated it. We still don't see eye-to-eye on most things (obviously), but we can at least talk civilly and openly, thank God.
Whew! Hope this was something along the lines of what you're looking for; it seems like forever since I told that story; guess it was building up in me!