Watch out for those cookies

Today William and I baked cookies during Wynn's nap. I try to do a fun project with him during nap time and baking is something that always ends in a yummy reward for our efforts.
When they were ready to eat, I gave one to him and one to myself.
"Mama, don't eat all," William said.
We both love cookies.
"Oh no, I wouldn't do that. I would get fat," I said.
I have eaten too many cookies and other things lately, so I really shouldn't have had one!
"Mama fat?" he asked.
"If I eat too many cookies"
"Mama fat and old?"
Hum...I don't like where he is going with this conversation.
"Not old yet," I say.
"Mama old, in a box?"
In a box means dead, in a coffin. Not sure if he really gets it, but we frequently drive by a cemetery and the kids would shout out "park" and "flowers". It seemed wrong, so I tried to explain that when people die they go into a box and are in the ground. The flowers are from people who miss them.
Grandma's cat was very sick and died. I tell them grandma's cat is in a box.
"Mama old, in a box, in June."
That made me laugh. He has just learned about June, it's the month his sister turns two. And apparently, the month his mother will get old and die if she eats any more of his cookies.
So watch out for those cookies...and a three year old who wantw all of them!