Another idea crossed Jon's mind.
"Sorry I was so rude, I was wondering how dad could be pregnant if you both only have male genitals?"
A look of sympathy crossed his moms face. "I... I was always wanting to let you kids know about the experiment, but... I didn't think you were mature enough to. I'll go into details when you all gather for dinner."
About that time his dad came home, dressed in his business suit, but with his belly huge and tight like a beach ball, leaning back supporting his back with his hands. He plopped his weight down on a chair, relieved to get it off his feet.
