Walked In On My Wife

I came home from my business trip a day early to surprise my wife on her birthday and instead when I entered the house I heard a squeal coming from the bedroom that sounded like my wife was hurt, I rushed to the door and realized it was actually moaning and squeals of obvious pleasure. My had her face buried in a pillow while in a clearly very well hung man was going to town on her from behind. They were clearly to into what they were doing to see or hear me so I walked away and out of the house, to embarrassed to stop them. I drove to a motel playing the scene over and over in my head and knowing he had most likely finished or would be finishing inside of or on the love of my life very soon. What I didn’t realize until I laid down on my motel room bed was that I had grown rock hard thinking about this. I was totally a cuckhold and my body liked it for whatever reason. I jerked off to the thought of my wife swallowing another mans cum. I still haven’t had the courage to tell my wife but I secretly installed security cameras in our room and found out there are actually about 3 guys she hooks up with and they’re all noticeably bigger then me. I somehow feel less of a man but also super turned on and constantly jerk off to the videos. What should I do?