Wife of 3+ years has been in an emotional relationship with another guy (married with a 3 month new born) the whole time. What should I do?

I met my wife in 2016 and we got married in 2022. Since has been in an emotional relationship with another guy (Harry) from the day we started talking. Harry got married about 4 years ago and has a 3 month old daughter with his wife.

Background: my wife and Harry had on and off flings since their high school days until 2015. In 2016, my wife and I met each other, and we hit it off instantly. She is an absolute amazing person, caring, family and friends oriented, etc. As a result, we got married in 2022 and life has been amazing ever since.

A few days ago, I caught her texting a mutual friend (Harry) which wasn’t a big deal. However, I ended getting a look at their texts which kicked off a rabbit hole of investigation while she sat there watching me go through their texts in detail over the last 7+ years.

From the conversations, she was definitely in an emotional relationship with him (wanting to talk to him, he around him in group settings, ask for advice, etc.), but Harry was in an emotional AND romantic relationship with her. He always asked for them to hang out 1:1, asked for selfies in certain clothes, etc., which she never did any of them.

I think her and I can get past this once she works on herself, but I think it’s necessary to tell Harrys wife about this and let them figure out how they’d like to proceed. Mainly because Harry was emotional and romantically in love with my wife.

What should I do, think about, etc.?