OP, sorry, I did read your post. My point is that you are probably only meeting up for a couple hours at a time, so it should be possible to talk about things other than kids for 2 hours. I'm not saying you should be happy to do it -- or that you should do it at all, if you don't want to. I'm just saying it's not the most impossible thing in the world to do, if you want to make that effort.
I don't think talking about kids is the same as talking about work or hobbies or whatever. Motherhood is an incredibly emotive subject, it raises all sorts of issues for many women. Yes, your friend is not being very pleasant about it, but instead of flaming her, why not try to find out exactly what her problem is? You say you 'suspect' it is a combination of boredom, envy, hatred, which says to me that you haven't really addressed it directly.
As I said, I am going through this myself. I have gotten my dear friend to go from a stance similar to your friend's, to the point where she will babysit. I didn't tell her she was rude, I didn't shun her, I just tried to listen to her reasoning, told her that it made me sad she felt that way, and that I hoped she would come around. I had to go through a period of barely talking about the baby, but gradually she realised on her own this was a ridiculous set up and now things are much better.
You can look at this as her 'dictating the conversation' or you can see an old friend who must be really hurting to say something so extreme.
I'm not saying you're being unreasonable to resent it. Just arguing for a bit of sympathy, I guess.