I have talket to some christian women on different forums. Many of them seem to live a life full of inner conflicts between their real personalities and the church. Many of them are very frustrated and tent do be desperate in one way or another.
Probably she projected her own frustration on you, at least she put the blame on you to make herself look better in her parets eyes.
Religion and love/sexuality can be really complicated and destructive.
Some years ago there was a study indicating that Mormons and JW's felt the most guilt over their own sexuality, and that non-believers felt least guilt.