I’ve been through this a few times but the only way I’ve gotten out of it was by distancing myself. Like trying to make it seem like you aren’t available for that kind of conversation such as making yourself busy with an important task or consistently finding jobs away from her. Soon she could find someone else to talk to. If you’re looking for a stable rather than what-if solution then find someone you trust and have a LOUD conversation about how you feel so uncomfortable with personal topics of convo at work. I hope I could help :)

my SM overshares about his butt cancer (goes into detail about his bleeding asshole) and his marriage troubles. this was a problem of his at his previous two stores, and it’s how he ended up at mine. our DM just shuffles him around after people start to complain. my store is a block from campus, staffed by mostly 18-20yo students working 12hrs/week- they ESPECIALLY don’t give a shit about his problems, and two quit in the spring because it ruined the job for them. i explained to him a while ago that partners don’t know (or want to know) the context of his stories, so it’s uncomfortable for them despite his ~intent of making a connection~. i really had to cater to his ego in order for him to understand why it’s not okay, but he DID stop oversharing with *most* partners. not so much for me- my honesty about it apparently made him believe i was an exception, and 3 NEW partners who were hired over the summer have commented on how much he overshares with them as well. our DM won’t do shit, so i’ve learned the only way to get out of those conversations is to never stop moving. if he is around, i don’t necessarily avoid or ignore him, but i do make it a point to seem preoccupied or distracted by work tasks so that i can usually find an out mid-conversation, under guise of ~doing my job~. he can’t tell me about how much he hates his wife without following me around like a puppy to do it, which also makes him look unproductive and in-the-way. it’s been a pretty effective and discrete solution imo