I lied to my wife, said I was going to work, just to know what she and my surrophew were doing

I was already suspicious of everything that was happening and really wanted to be sure before taking any action, so I said I would work normally and I returned home early and to get that flea out of the back of the ear I was left with this whole situation and I ended up coming across my wife and my fake nephew having sex full of horniness and desire on the bed, Even with many sighs and moans from my wife.