"Jon," both Sarahs said in unison. "What the fuck is going on?"
"You couldn't obey your mom's command and my command at the same time, so you split into two versions of yourself," Jon explained.
"How do we fix this?" the Sarahs said at the same time.
Jon answered by saying "You will both merge into one Sarah."
The two Sarahs moved towards each other and merged into one Sarah.
"That was weird," Sarah said.
"I think I should make another wish to fix this. We don't want you to be splitting off into multiple Sarahs. Now do we?"
"Definitely not. I'm not going through that again."
"Okay, then. It's agreed. I wish that if Sarah is given a command by more than one person, then she will only obey the latest command given to her."
Sarah didn't like that she had to obey any commands, but she never wanted to split into to two people again, so she was content with Jon's wish.