Extra Safe Space is a place for things you’ve never told anyone before. These will always be kept completely anonymous. To tell your secret, fill out this form (it doesn’t ask for or record any identifying info). That is the only criterion. Or read other people’s here as they come in.
My husband had an affair with a significantly younger woman while we had 2 kids under 3. That was over a decade ago. We stayed together and I told no one about it. A couple of years ago, she died. I was so relieved that I wouldn't have to worry anymore about the secret affair being exposed and that my kids would find out.
They will probably find out someday. Things like this have a way of coming to the surface. I think it's ok to feel some relief for the present, though.