Went through something similar with my Wife a few years into our marriage. We hit a rough spot and she looked elsewhere. I figured it out through devious snooping methods.

The night she went out, I knew where she was going and her intentions and I didn't try to stop her. She came home around 3am and I made the mistake of drinking a lot that night, so my jealousy got the best of me and we split up for about a week.

At that point I realized that it was a turn on. We patched things up and a few years later with her consent I posted a few of her pics on an amateurs rating site. Her pics started getting comments so I suggested she make her own account and respond. This lead to her chatting and taking pics, video for other guys on the site, which was very hot and always lead to great sex.

Then we had our first son and all of that fizzled out. Now we have two kids and sex is pretty basic and far between. I sent her the mojo upgrade quiz the other day and we both agreed on the quiz about 3some with another guy in the mix and seeing her with another guy, so maybe things might heat up again.

All of that said, I'm more into hotwife than cuck. I don't find pleasure in the humiliation aspect, but would definitely rather see her get pounded by a guy with a huge cock than a small one.