You're ignoring that many people don't want to rock the boat. And anytime you tell a child that the person they thought was their daddy, isn't, you're rocking t

You're ignoring that many people don't want to rock the boat. And anytime you tell a child that the person they thought was their daddy, isn't, you're rocking the boat. Regardless of the age of the child. If this is an un-partnered mother and her children, then sure, much less excuse to not tell the kid, and much less reason to not tell them. But for partnered couples there's an inherent friction built in.