Well congratulations on meeting the man of your dreams. The only advice I can offer is that you two have to present a united front, remember that old saying "divide and conquer".When speaking to her it is "we" not "I" and just be pleasant. I am not sure if you have had contact with the child so far, but stand back there, make sure the main focus is time spent with her father. That is the only subject you stay out of, you are not trying to replace her as a mother, it is important to keep things calm for the child's sake. A relationship with the child will come in time, right now you don't want to give her any ammunition to use against you. Good luck, be confident, you have done nothing wrong, make sure you and your partner keep talking and don't let her get in between the two of you.