I wouldn't let that happen!

M loves grapefruit.  Our neighbor gave us a grocer bag full from her trees.  She also gave us a pomelo.  We peeled it carefully to make a funny hat.  M set to eating it very happily.  She wanted me to come help saying "I can't eat the whole thing myself!" 

I replied "You don't have to."

And she exclaimed "And let it go to waste!?  I won't let that happen."

I let her know that she could save some for another day.  Phew!