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?

Honestly, keeping quiet about it is cowardice. If you had the bravery to cheat on her twice, no reason why you can't own up to it. You've already gotten flack about it from everyone here, so I'll spare you from that (though I probably shouldn't) What's more important now is that she has to know exactly what's she's getting herself into as well. If you're not committed to her and the pregnancy, she needs to know all the facts to make her decisions to leave or forgive you. Grow up. Grow a pair. She doesn't deserve to be lied to. No one does.