After Jen was done peeing, she left the bathroom, expecting to see her now older brother standing there laughing at her. But he was nowhere to be found. At first thought, Jen saw this as a good thing, but then she thought about the fact that if she's not around to hear any wishes, she'll think that the new reality created by the wishes is normal. Maybe Mikey will wish that she'd think that she really is a girl. Jen didn't want that. She wanted to be Jon again.
So, she ran around the whole house, looking for her brother. But he wasn't there. Where did he go?