Not sure where I fucked up. Took the RP last Oct and I have been happy, feeling alive, down 20 lbs, staying in my frame (thought my wife was too) and having the most intense sex of my life every few days. Setup a week vacation to Vegas with a second couple and no kids. All was good until we landed and my wife shuts down. Spent most of the time alone with the other husband telling him to step up and stop being a BP husband or with our wives trailing behind us but for meals. All attempts of sex and fun was shutdown.

I have no idea what should be done and how to prevent this in the future.

Edits: Based on the comments, I'm adding more detail.

Should have said going out with the other husband alone drinking, valley of fire, walking the strip, old strip, go carts and gambling. Our wives were with us about 60% of the time but not engaged, trailing behind us and complaining to go back to the hotel (offered to send them in a cab). I had a great time minus my wife and only missed one DJ that I should have seen.

The other couple was my wife's sister and husband.

I always bash my brother in law about manning up to his wife.

To me, my wife shutdown is when she tells me she is tired for no reason and just wants to sleep. Stops responding to flirting and does not want to have a drink when out. Shit testing and when I attempt sex, I get a nasty comment or I'm tired response.

Thanks for the input, really helps.