Okay that's an intriguing opener, but a few more details would be helpful.
Are you saying your ex partner was a sex for money worker ? If that was something you don't care for, but didn't know about while in the relationship, maybe you could ask the next potential partner.
If it didn't bother you, do nothing and enjoy the mammaries, err memories.
If she WAS an escort before your relationship, I’d say it’s water under the bridge. There is a reason the windshield is so large and the rear view mirror so small.
If she was doing it without your knowledge during the relationship, then that’s bad.