was King Tut's tomb originally larger?

The theory posted by Egyptologist Dr Nicholas Reeves -- and findings of cracks in the plaster of the burial chamber in KV62 -- may indicate the tomb was originally much larger than discovered.  His tomb was opened at least twice, once by robbers.  His items were seen as being crammed into the discovered rooms, as seen by Howard Carter's archaeologists.  What if the tomb was originally larger and someone else -- his Queen perhaps -- was buried there and his stuff was moved out?  The entrance was plastered over and had inscriptions on it; the original rooms undiscovered would have  more murals and inscriptions -- probably related to Tutankhamon.  

In my novel - Eye of the Pharaoh (The Flawed Emerald c.1995) I said there was a "secret chamber that was sealed with blocks of stone and plastered over with inscriptions."  This chamber had an "emerald with a golden lotus ring" and "Tut's diary" or papyrus; another tomb nearby was Queen Ankhesenamon's tomb.  So if the theory holds, these will be discovered soon. 

MC 2015.