Caught Husband Being Gay

I went to visit my husband at work since I was in the area for lunch. He was working at the building that we own getting it ready for the next set of renters, He’s not in there, so I go outside to wait. Smoke. I noticed the appliances repair was in the back, replacing one of the machines. I go in and there is my husband going licking this guy's dick and even looking up at him. He was in shock, eyes lit up. I just walked out. Never seen this or expected this. Ever. I’m not mad. Not disgusted. I just wanna know who, what, when, and fucking how.