Sneaking into Mommy's Bed

I woke up with a start last night at 3am. I was laying on my side and realized that there was a sleeping 3-year-old firmly planted against my back. I have no idea how she got there or how long she had been sleeping beside me. Either I am becoming a much deeper sleeper or Kaelyn has found some pretty stealthy moves in her ability to get into my bed without waking me up!