I cheated on my wife during third trimester. It was random but i did it twice. Its eating me up! Keeping mum seems like my best option...any thoughts?

I am currently going through a divorce because my ex husband was just like you, random cheatings when I was pregnant. It continued even after I gave birth. I might have reacted differently and consider forgiving him if he had been honest with me instead of denying and accusing me of not trusting him. But all I felt was sheer utter disappointment that while I was carrying his son for 9+ months, suffering all the pregnancy symptoms, he was out there being single. Sure, you can keep mum since you don't want to "hurt" her but what if she finds out anyhow without you telling her? Or what if she already knows and is keeping quiet about it? Surely that will "eat her up" even more right?