@Mrknowspeople,
If you love your wife, then you have to understand that marriage is a business. So is relationships. Like how a boyfriend girlfriend thing does not really count. You could be associated with whoever, etc.
In this business, just make it clear "you had yours and I will mine". That is it. Or have her do something she would not normally do, like something XXX, or maybe a chore, or task or whatever it might be.
You have couples like this. They are together, but they have random sex with random people. They might hint at it but they never ever be honest about it.
IDK group sex? Swinging? have her watch. IDK what would be the terms of the actions.
...........
Why be a cry-baby and go through a messy separation/divorce bs. In fact you could just make her sign a special agreement that state "I violate the marriage via _____ and given my husband permission ________.