Little Johnny at the hospital

A three-year old walks over to a pregnant lady while waiting with his mother in a doctor's surgery.

"Why is your stomach so big?" – he asks.
"I´m having a baby." – she replies.
"Is the baby in your stomach?" – he asks, with his big eyes.
"Yes, it is." – she says.
"Is it a good baby?" – he asks, with a puzzled look.
"Oh, yes. A really good baby." – the lady replies.

Shocked and surprised, he asks:
"Then why did you eat him?"

What would you answer?