-possible SPOILER-
Arch_Angel, you may try the following:
After Aerie get's pregnant she talks I think three more times to me.
1. I don't remember very good but she tells you to keep her pregnancy as a secret (or something).
2. Aerie and your hero marry. During my game it happened after I had beaten the Ravager.
3. During my fight with Mellisan after she returns to the mana shrine I paused the game for more than a hour. After that Aerie gave birth to a child.
I think the last two dialogues are based on REAL TIME not GAME TIME.
Hope you get some hinds.