Strangely enough, I found
@mixed_biscuits to say sensible things a few pages ago. First time in a while!
I think with the bringing up formers, alternative life options etc. it really depends, if those make you feel bad, then probably ok to let her know about it, but as far as no emotional commitments go – I tend to think those are topics pretty alright to discuss with someone you're just seeing for a while.
So the question might also be whether she's trying to make it seem casual to you? Or is she trying to make you feel jealous or purpose? Is there bad intent involved?
Or maybe it's just casual funny facts?
Some ex convo can be a bit icky, but a) might be understandable if it was a long term thing to some extent (also depending on how she brings it up ofc) b) biscuits might be right in a sense that if it's just a casual thing, there is no justification for you to be hurt by her mentioning XYZ topics. Just my opinion here. I think it's chill really, just try to not tear yourself over it, get busy with something else a lil! See what happens...