I'm guessing you've posted about them and my old brain just doesn't remember...
Are the R talks fairly similar? ie. Same content, same context?
If yes, then if she starts again, I would say just gently remind her that you would prefer not to rehash old stuff. And if she persists, warn her that you will end the convo however necessary and if she still persists... end the convo...
That is YOUR boundary. She will only understand if you are consistent with it and enforce it.
But...
If the content is different in each convo... then the question is... are you LISTENING...? Because she's probably giving you insight into things that you might want to look into, of yourself...
I'm not sure what small talk with a WAS looks like, either... but I'm taking the lead from my W's past convo and introducing things like "hope you had fun at..." and other cheerful statements that I would say to any other "friend", in the convos around the kids...
If that doesn't work... I'll have to try something else...
