Jon looked at Biff then Tiffany and smiled. If he indeed got her pregnant, only to leave her for Sarah, he'll get what he deserved. He selected Tiffany and then tried to select Biff, but hit 'enter' instead.
Tiffany was engulfed in a glow.
"What's going on?" said Karyn. "You used it on one person?"
"Yeah, my mistake, I meant to... wait a minute, that isn't supposed to work! You need to use it on two people!"
"But you used it on Tiffany, and she's one... wait a minute. She's pregnant. She's going to give birth any day now. She basically is two people, one inside and one outside."
They looked up to see the result of the merger of Tiffany and her nearly born baby....