What is the wisdom behind hiding adultery between spouses?

What is the wisdom behind hiding adultery between spouses? I know we aren't supposed to advertise our sins, but regarding hiding something as big as adultery, which is one of the biggest ways to desecrate the rights of the spouse, shouldn't the spouse have rights to know such things so they can make a decision to keep the marriage or divorce? I am terrified that this can happen to me and I wouldn't have any knowledge of it. The adulterer would share a secret with my wife that I wouldn't know about, while I'm supposed to be the closest with my wife. Scary topic.