Our Adopted Child "NotMe"

On April 13th I wrote a blog titled "I Didn't Do It".  Have you ever asked your kids who did something, such as "who left the toys out"?  We used to get the I didn't do it comment, which of course drives me crazy.  Someone did it and I am going to be the one who ends up having to clean it up or put it away, so someone needs to own up or rat out the culprit.  Never mind my comments about not being a tattle tale.  Tattle tale and save my sanity.
  Well, it worked.  We have discovered that we have a fifth child that does nothing but create messes throughout the house leaving the others to take the blame.  The charade goes on no more as the kids have ratted out this fifth child and his name or her name, not quite sure yet, is "NotMe".  Apparently we adopted NotMe a while back and the kids have just recently caught on to NotMe's dasterdly plan to get all of them in trouble.  Just the other day I cleaned the basement and a few hours later I went down and there was a mess.  After confiding in the kids that were down there all of them informed me it was NotMe that made the mess.  Of course NotMe was no where to be found, which really ticked me off.  When the kids asked me who had to clean up I answered "NotMe, now go find your new sibling and help clean up". 
  NotMe apparently loved my most recent meal creation and when asked about my new shirt and who liked it I found out NotMe once again stood alone liking the shirt.  I am really starting to like NotMe and tomorrow we are going to the dump together.  I think the rest of the kids are really taking to NotMe as well.  After all, when I asked who wanted to join me they all volunteered NotMe.  I must say, it is becoming annoying that the kids won't let NotMe speak for him/herself.  In fact, if NotMe would stop hiding from me I would be able to figure out if my daughter has a new sister or brother.
  My wife just informed me that we never adopted a new child and that there really isn't a NotMe sibling running around our house.  I am not sure how to take this as it means one less person that likes my meals at dinner time and no one to go to the dump with me tomorrow.  It does however create a mystery regarding the mess in the basement and the numerous times clothes or toys are left lying around.  "I didn't do it" and now finding out NotMe is NotReal, I am going to need help in getting to the bottom of these disasters throughout the house.
  Tomorrow morning I am going to call the kids on their little charade and instead of asking who made the mess I will inform them that, "NotMe has gone to stay with my sister and her family for a little while so I would like to introduce you to IDid and his twin sister IWill.  They will be staying with us for a while so remember their names and use them often".