Jeff backspaced Lauren out of the target name, he couldn't do that to his mother. Without his mother, Jeff wouldn't exist. But he had to test this somehow, Jeff wanted to, at least, see the results before he tested it on himself. What could he do? Who could he test this on?...
...and then, Jeff's little sister walked into his room. Jeff noticing the sounds of footsteps turned around and saw her in the doorway of his room. "Did you hear? Mom wants you to cook dinner tonight!" Jeff's little sister, Rosie, said annoyingly. Jeff, already knowing that his Mom was making dinner, replied with "No, I'm not". Jeff forgot that if you reply with the words "No, I'm not" to an annoying little sister, a repetitive rebuttal of words, usually the words "Yes, you are" and "No, I'm not", will happen and could last minutes. After at least 2 minutes of repeating those words, Jeff decides to finish this war of words by saying "Get OUT of my ROOM!" and slamming the door. He locked it, making sure she couldn't enter again.
Jeff then had an idea. An idea that made him smile like the Grinch that stole Christmas. Jeff entered something new to the target name. A familiar name...
TARGET NAME: Rosie.
...and this time, he wanted to make sure that reality, for Rosie, would change...