your wife is a classic case for romance addiction... When her romance dies, she will escape again.. and repeat that until reality comes knocking in the form of pregnancy, cancer, or menopause... You can try to educate her... She may even return when her current addiction fals apart in hopes you can offer her a newfound romance again...
She needs to grow up.
Absolutely. All of this. I know it too. I wish I could do something about it, but know I can't. Always been a thrill seeker. Both of us have. Difference is I scratched the itch with adventure sports and my career rather than extramarital affairs.
Reality is that which, if you don't believe in it, doesn't go away.