Another late night last night with Celerity.  I ended up going to bed in my lounge around the house clothes, in anticipation of having to get up and feed/comfort her again.  This morning I was getting ready to take a shower, pulled off my socks, and threw them into my sock bin.

My sock bin mewed.  I didn't think this was normal behavior for sock bins, so I took a look and saw this:

Mystery Solved.