Three Way

This is wild
My wife and I had talked about having a threesome for a long time. We were clear on boundaries—everything was supposed to be shared, nothing sneaky. One thing we agreed on: she would be the one to find the guy.
At the time, I didn’t think much of it. I assumed she’d find someone casual, maybe someone we’d meet once and move on.
Well… it turns out she had actually been meeting someone for a couple of years while I was working—she picked him for a reason I didn’t even know until years later. They would meet in our camper, which was parked at a local campsite. I didn’t find out about it until much later, which explains why she had picked him specifically.
The guy’s in his late 30s, confident, 6”cock easy to talk to, and clearly someone she enjoyed being around. When I finally met him for the first time, it was casual—just hanging out, feeling out the vibe. Honestly, I went in thinking this was mostly about her, making sure she was comfortable. I didn’t expect to feel anything myself.
But that night, I realized… I was enjoying it as much as she was. Way more than I thought I would. It wasn’t jealousy, not at all. Seeing her so into it, feeling the energy between all of us, listening to her make noises that I hadn’t heard her make before while she was getting fucked by him it really turned me on, it hit something in me I didn’t know was there.
I went in thinking this was a favor for her fantasy. Turned out it was a new side of me too.
I’m still wrapping my head around it, but I’m curious… has anyone else ever discovered that they enjoyed a situation more than they expected, even when it was supposed to be “just for them.