S/o is being sketchy

So I found a weird text from yesterday (Tuesday night) on my s/o’s phone. (Note: I happened to be working Tuesday night, I’m a nurse so I work 12s) It had another phone number to call to “Connect.”

Disclaimer: Not that I need to explain myself but I wasn’t looking through his phone, he knew I had it in my hand because I was going to send some pictures I took with his phone to mine from my bday and that message happened to be right under mine.

I didn’t ask him because at first I thought it was one of those scam messages. But I’m laying next to him and I couldn’t stop thinking about it. Yes, I grabbed his phone but only to get that # that it said to call. I called and to my surprise, it was one of those sex lines 😭 we’ve had problems in the past. He’s hid who he talks to from me. And not just anyone, his ex from years ago. He claims that they’re just friends and she calls him to vent about her relationship with her current man to him. I don’t mind him having female friends but when you hide them from me, it becomes a problem. We talked about it and he stopped talking to her, blocked her even. He said it wasn’t worth losing me over that.

Well now I just opened up a whole other can of worms. Am I over reacting or do I have a right to be upset? What would you do if you caught your man on a sex line?

I will be talking to him tomorrow about it. Idk if he called but the fact that he even thought to sign up or whatever it is he did to get the text just makes me sick 🥴💔