You wrote about a single encounter that too place ‘yesterday’ and now that WL is gone far away.
My comments would be:
1. Don’t worry, you’ll get over her.
2. Enjoy the memory while it’s still fresh.
3. You’re lucky the WL is not accessible as this saves you seeing her again and again and building bonds and making decisions that could damage your marriage and entire status quo.
4. In 99% of cases, any man that ends up with a long-term relationship with a WL he paid for sex will have a nagging feeling she might do tricks again (trust is never there).
5. As we are told by women, we (men) tend to be pathetic and pay a lot and/or take huge risks just to get our rocks off.
P.S. most of the above is written from personal experience. She was a young 22 year old massage girl and I was a 34 year old going through a divorce. The minestrone soup of passion and agony and fantasy blew off a year of my life.