I had an Aunt like that.

   When i was about 8, we used to go camping in large groups.
   "Happy Wanderers". Families, that sort of thing.

   Anyway, one time, my mom had to leave for a few hours and she
   asked my Aunt to watch me. She said, "Sure".

   Mom comes back a few hours later.

   "Where's Kenny?"

   "Oh I dunno", my Aunt lovingly replied, "Not my kid."

   Last time Mom asked her to keep an eye on me. tongue emoticon