You are in "THE JESUS TRAP", what Darrel Ray discusses in his book "Sex and God: How Religion distorts Sexuality". You sound like a classic case. Once the romance becomes less intense, and the sex not as fantastic, usually in a few months there is aconscience crisis, and she will go back to her religion to get her guilt forgiven. Then all the conditions YOU have to fulfil will be laid on the table.
Look this up, we have seen this situation soooo often here that the events follow an almost monotonously predictable sequence.
HB