What is the most savage revenge you've seen someone take on their ex?

It was my ex. Father of my sweet boy. It's not as “savage" because I don't believe in giving him a dose of his own medicine but it was the best revenge I could do to him.

We were not married. He proposed twice, I said no on both occasions.

I was unemployed. I got him a job at where my brother worked. His job involved long trips to locations where they would stay a few days to a week at a time. Because I had no means to provide him allowance, I would borrow money from my mom which I pay her back when he gives me a part of his salary (just enough for milk and diapers).

On such trips, he and a colleague would eat at restaurants and meet other people, especially waitresses. While he was on a trip, I would raise our son and maintain the home for him when he gets back, like a doting partner would.

He just got back from a trip and I was emptying his pants pockets before washing when I found a small paper with the name Melanie and a number. I asked him about it and he said he intended to throw it away but forgot. Strike One. I let it slide.

One morning, as he was taking a shower, his phone buzzed, I checked the message and it said, “Good morning. <3 <3 <3”. Strike Two. (What were the hearts for?)

Third and final strike. He couldn't find his phone. I tried calling it. We searched all over. When I finally found it, my name registered was “BUDDY"!

What. The. Fork!

I promise I will get to the revenge part. Lol.

I think he tried explaining why my name was “buddy" but all I could see was his lips moving. I have already cried countless nights because I felt something was wrong.

My son was 3 when I kicked him out. I heard he had been living in the office quarters and that's just about it. I slowly made myself not care what happens to him.

Now for the revenge part. My mom supported me all the way. She and my younger brother helped me raise my son and encouraged me to look for a job. I volunteered at a public hospital and then got accepted at a private hospital soon after.

He came to see my son and mom a few months after when I was working and was crying for them to forgive him and for me to take him back.

My “savage" revenge?

I said no.

Edit: I didn't expect ten upvotes on this one! And thanks to the Son of Quora for taking a chance on me.

Edit #2: 1000 upvotes! Yay! Thanks guys!