What is This?

THE Twins are not allowed on Mom and Dad's bed or bedroom unsupervised though if they have the opportunity, they will sneak in there every opportunity they get.

For example, recently the Boy was supposed to be napping in his room. But shortly after Dad put him down, all too quickly in fact, he stopped fussing. So Dad went to investigate. This is what he found.

He has a pattern and history of this.

So one evening, while preparing for bed, Dad spotted this.

Now, he knows the Twins had no opportunity to be in there with either Mom or Dad that day. So he used his superior powers of deduction to conclude that someone was somewhere they should not have been.