There’s a persistent urban myth that says if you die and no one finds your corpse, your pets may eat your corpse. While this has occurred in isolated instances, in most cases your pet won’t feast on your dead body because someone will have found it long before starvation sets in.
In general, a well-fed domestic cat will be unlikely to eat a corpse so you can rest assured your cat won’t turn on you while you’re sleeping. Then again if you’re dead, you probably won’t care what your cat does anyway, not that you could have changed its behavior in anyway even while you were alive.
To learn more about whether a cat would eat your corpse, click here.