My fiancee wants to have a baby?

My fiancee Dawn told me of her intentions to get pregnant. She told me she doesn't want to wait till we get married to get pregnant. I love her and i want to marry her but i think we should wait till we are married to start trying to conceive. She told me she wants a baby so bad and how she has always wanted to be a mother. Our wedding is in 2 months and i would just love to wait i told her this but she told me she is sick of waiting and she wants to get pregnant as soon as possible. I know my parents would be livid if i had a child out of wedlock. I think it may have something to do with my daughter i had with my EX wife. I think Dawn doesn't feel as close to me because of my daughter i have with another women and she is trying to catch up to my EX wife. What should i do?