Livid!!!!! I need advise

Today while fixing my husbands (of 15 years) phone I decided to snoop through His messages his Instagram Ect. He’s been married twice before, 1st at age 17 divorced by 22 he married. Again at age 24 and divorced at age 27... he had two girls with his first marriage and 1 with his last. Well today as I was going through his messages I saw that he had been texting back and fourth with his two oldest daughters now 25 and 22 they were having a conversation about how child support had finally been closed and they( his daughters) wished him and their mom could now get along. They (daughters) expressed how both him and their mom had a different story as to why they split up. They asked and said they wished they could just put it all past them and move forward, because at the end of the day the ones who were hurting where them( daughters) (Agree 100%) my husband proceeded to say to them that he also agreed and wish things would have been different but just did not quite work that way. The. He said to them.

“I will always have a special love for your mom, she’s a good woman”

(WTF!!!! Mind you this is the same man who’s cussed her out countless times)

Not only did he say that but he said ...

“Let your mom know if she ever needs dick. I can help”

Lmao!

They just said “eww dad”

Should I be livid, furious or let this one go????

With this baby momma he’s always hugged and gave her a peck on the cheek when he sees her. 2nd baby momma who was always les dramatic. Has always been a hand shake type of hello.

Okay but wait....

I went through his Instagram and he’s been chatting with women back and fourth while I am at work just asking them about their day, and asking them to keep posting because he like to look at their post’s

This other woman he messaged he just said Hello and told her how pretty she was. Should I be Livid, mad, or let it go?