Echidna, in the situation you've described, your friend seems to have little respect for your choices, and I can understand how her offer to pray for your daughter makes you feel uncomfortable, because she is implying that there is a 'need' to do so. I feel that there is a difference between somebody praying for you (for example, that good things happen in your life) as an extension of love and respect, and somebody praying for you because they believe that you will not be a full and complete person unless God is in your life.

Belief is such a personal thing. The fact that I don't believe in a higher power does not make a Christian's belief any less valid, and vice versa.

Would you feel comfortable telling her that you respect her faith and that it is important to her, but would prefer not to discuss religion with her at all unless she genuinely is interested in your choices? I agree with Amy that it is valuable to have your own moral position clearly defined, and at the end of the day, all you need to know is that you are comfortable with your own beliefs, if somebody else is not, that's their problem.