My ex did cheat on me. The bitch he was doing was also married. Her husband's sister had been following her, because they suspected she was cheating. Her sister in law manage to film them driving to a house, necking on the porch. When they went inside, she video'd them in the living room making out. And NO, they didn't notice it.
I was working a 16 hour shift and was given the tape the next day. Oh, I got even! My ex has sleep apnea REAL bad. I was able to put a foley catheter in him, without the bag. Then I left for work. A wet bed woke him up. His mom's a nurse, too. He had to explain to her why it happened. I had bought him a 200 disc CD player. Most of the CDs got superglued in it, so they wouldn't play. Then every window in his truck, and all the glass gat smashed. Then it "rained" about 15 gallons of water in the has tank!!
I didn't get mad, just even. She ended up dumping him a couple months later.