What level of secrets most we keep in marriage?

This to all married man and woman..... I was in court to witness one case... When I listen to another case... The case Gose those...
The husband explanation to is wife about having sex with there house help brought then to court for device..... Not that the wife knows about it but the husband think it's high time he tell his wife about the extra mariter affairs. Secret told Leeds them to court..... ........most we keep secrets.. Or what do u all think