<human>: The reason I'm asking Reddit is because you are impartial and very bright people.

So here's the backstory:

I was married to my high school girlfriend after college. After seven years of being together, a year engagement and 3 months of sex-less marriage, I found out she was having an affair with one of the ushers from our wedding. This affair, from what she told me, started before our marriage. 

So we got a divorce. I moved away. Met and fell in love with my current girlfriend. This happened years ago. So emotionally, I'm in a better place.

The other week I saw on my ex's Facebook page that she got married to the usher. We aren't friends, it just popped up in the "People you may know" section. And her name was hyphenated, that's how I knew.

Ever since I saw her updated name, I've been increasingly angry about the whole situation. So I'm writing a letter to her, with the intention of not sending it. To make me feel better. 

Question is, should I send it?

Can you provide a brief overview of the text?
<bot>: Ex-wife just got married to the guy she cheated on me with. Want to write a letter. Should I?