She knows you are a cuckold and she should share this with you. She also knows that cheating sex feels so much better, you not knowing, not having to tell you the details. Just enjoying that feeling of being wild and free.
You do sometimes envy your friends who have wives who are faithful to them and who have frequent sex with them -- and you wonder what it would be like to have a marriage like that and to be the kind of man a woman would want to be faithful to -- but that's just not how things are in your marriage, and you can't change the kind of person you are -- and your wife is right -- you DO love every part of being her devoted cuckold.
"That's pretty bold of you to hit on a married woman. I like bold. Have a seat."