Someone's Been Sleeping in my Bed

I went up to bed a few nights ago. I could have sworn I heard breathing in my room. But I looked at my bed and there wasn't anyone in it:

But there was definitely a small child breathing heavily in my room! I looked in the closets, under the bed. And then I saw this peeking from under the covers:

Samuel was completely covered with the bedspread. What a stinker! He had snuck in my room after I put him to bed and snuggled right in!