Tell husband’s gf about HERPES?

I’ll try to make this short. My soon to be ex husband has a girlfriend who I just met a couple of weeks ago. We talked and she wanted to know why we’re getting divorced and she told me a little about their issues. She’s already experiencing some of the things I went through with him such as lying or withholding information (like she had just found out the prior week that he was married 🙄), and him being inappropriate online with other women. I’ve had herpes for 16 years and 10 years ago when he and I first met, I obviously disclosed that information to him and he was fine with it. He’s never been tested but there was this one time he thought he may had been having an outbreak. This was YEARS ago. I decided to text him after meeting her and tell him that I really liked her. Then I told him that although it may not be any of my business that he should disclose that there is a very big possibility he has herpes. He never responded. I know he hasn’t told her because that’s the type of person he is. I feel bad because if it were me I’d like to know but I also feel like it’s not my business. He and I are already at odds and I don’t want to make things worse between us but I’m also a girls-girl 🤦🏽‍♀️. Any advice?