<human>: Can you give me a shortened version of the text?

Basically I saw some texts that I regret seeing on his phone. He was sending very flirtatious messages with this woman and some photos as well. No nudes or anything. It also looked like they would take breaks and lunch together at work. It bordered on too friendly for me and made me uncomfortable.

I confronted him about it and at first said it wasn't a big deal. The next day he apologized and said it was wrong of him to be texting another woman that way. He said he wouldn't do it again. Now she knows he is in a committed relationship and I thought it was shitty on her end to be so flirty with him knowing that. 

I trust when he says he won't continue this flirty friendship but I have been debating whether to contact her or not. I have her phone number and FB info. I just want to tell her that I am not comfortable with the texts they exchange and I don't mind if they are friends, just keep things strictly platonic please.

Should I message her?
<bot>: boyfriend of 5 years has been having on ongoing flirty friendship with a coworker and I asked him to stop, he said he would. Should I text her to let her know to stop with the over friendliness?