Jon sent a picture of older him and 'Karyn' to the printer, along with the family photo. It showed older him, his mom, a Goth sister, and a little brother only a little bit younger than he was. His mom looked much older in the picture.
Could that be it? He wondered. If his mom was younger, then she couldn't have had as many kids. Maybe that was why he was an only child. And why wasn't his father in any of the online pictures?