Dullindal wanted to fulfill his life goal and Talia wanted to have a baby therefore she couldn't be with him anymore and didn't want to since he wouldn't supply here with the necessary equioment to make a baby. It's like "If he wanted a baby we could stay together". it's all a matter of what she wants the most, Gil or a baby. Decisions, decisions, decisions.

I still find it strange that she joined Gil's cause all of a sudden.