Your wife stroked his cock as they sat across from you.
That instant hardon I get when I'm picking up my wife from my buddies house in the morning, knowing he's been in her pussy all night.
Everyone knew your wife had just fucked him, when they walked back into the party.
He would look at me occasionally while he was inside my wife, and watch me as I dealt with all the emotions. He’s been so much to us
My husband may only watch ^^
The decision for you is an easy one. As much as you know it will pain you to live as her pussy free cuckold, you know it's your own fault that she wants to cuckold you, and being her cuckold is far better than being her ex-husband -- so you do as she said. You get down on your knees in front of her, and kiss her feet, and then you beg her to start having sex with other men.
She has an amazing sex life.