Funny thing about being a parent: despite knowing it’s going to be a huge challenge, before your child is born you spend lots of time agreeing with your spouse on what rules you’ll be parenting under. It all seems so logical and orderly when you’ve still got a fetus instead of a child. We agreed that we’ll share discipline roles, our daughter won’t have earrings until she can take care of them herself, and so on. The big, big, big rule though was our children will sleep in their own beds. We knew that the occasional night terror or illness would necessitate a brief suspension of this rule. But we…