Am I wrong?

Long story short, have caught husband numerous time accessing porn sites, the sites don’t bother me it’s the lying he wasn’t near them when all I have to do is show the phone history. Anyway again today on Instagram he was following some yoke the usual single and up for a good time page, he first says knows nothing about it, then it turns to I just press follow. As I tried explain everyone he is friends with on Instagram can see that he is following her and I find it very embarrassing and degrading. We have kids, together years but literally at breaking point, am I in the wrong to get mad today? He’s making me believe it’s nothing but it’s the last straw at this stage and I’m so sick of it! Opinions please even if I am in the wrong