Is this cheating ?

So back story . I am a stay at home mom with a 16 month old . .. so today I was creating my self a new gmail to start job hunting .. when I created my email my husbands email that he says be never uses pops up because he’s used my computer to log in before I guess . So when it popped up I saw all these emails from only Fans and Reddit & I only know only fans for people posting naked pictures so I immediately started to shake .. he uses the same password to everything so I was able to log in to only fans .. I logged in and I saw him sending dick pictures to people and messages to people … I literally broke down then I decided to log into his Reddit and it was the same thing just way more messages of him asking girls to meet up and him telling them he was to play with there pussies and I woke him up & he tried to deny saying he didn’t know what that was then he started saying that he was doing it to make us more money I honestly don’t even know how to feel .. the last messages was literally from august 14 last weekend when I took our baby to go visit my parents . He works weekends so I usally leave weekends. I am so disappointed and disgusted and I don’t know how to act what to feel . He’s like apologizing but to me that’s cheating .. cheating is my literally only deal breaking and in my mind I feel like he has cheated but he doesn’t think so . I wanna just leave him bc now I’ll forever not trust him and it’s so disrespectful too but I don’t have a job and I have my baby girl I literally don’t know what to do I just want to roll up in a corner and cry ! What should I do ?