"You ready to go, honey?" Jon's dad (Roger) asked, standing by the front door, wearing his usual suit and tie business outfit. Jon's second mom smiled and walked over to him. He then turned and smiled at Jon's mom (Linda) and said "Bye honey." Then both his dad and his second mom (he still wondered who she was) both left. Either they worked at the same place, or Jon's dad was giving her a ride to her workplace, before heading to work himself.
"Okay, you two. You better leave," she told Jon and Karyn. "You too, Cindy."
That got Jon's attention. Who was Cindy? He turned and saw a girl, around 15 years old, the same age as his sister Zoe, walk to the front door, a backpack over her shoulder. She was fairly average, but the thing about her that stood out most to Jon was the fact that she kind of looked like a younger version of his second mother. It took Jon a few moments to realize that Zoe didn't exist in this reality. His dad's second child was Cindy. He had a kid with Jon's second mother, instead of his real mother!
So what about Mikey? Did he still exist? Or was he replaced by a child born from Jon's second mother as well? Or maybe Mikey did still exist, along with another (fourth) sibling.