Nope. I’d definitely leave the relationship first.
Yes. As long as everything's consensual and nobody's being exploited, then I don't see the problem.
One of my top sexual encounters was with an escort girl. It was last year, she was so beautiful. So much so I wished I had the money to be able to support her so she didn't need to do this as a job. Literally everything about her was amazing. I still keep the agency https://mx.pander.pro/en/escorts/tijuana where I found this girl in my bookmarks.
When you pick up a girl at a bar, you don’t really know anything about her - what she does or who she is; you just go with it if she’s interested. But when you book an escort, the agency provides all the information you need. I’m not saying it’s a huge difference - either way, you’re both there for pleasure.