She didn't have kids already, but she wanted to have them in the future. I absolutely do not want kids, I even got a vasectomy in my early 20s.
It's not really an issue you can compromise on as a couple, so it was better to part amicably than pursue something with no future, for both of our sakes.
I am a ML and everything I have seen of Jenkem's posting here makes me think they are probably a leftist.
We probably don't agree on everything, but they're no liberal.