Willow laid in Deans lap as he drove his impala to Sam's apartment. He had found the 5 year old during a previous hunt. Her family almost killed her trying to sell her to a demon and he was just in time to save her.

He had decided that he had no choice but to bring her with him because she had noone and something prevented him from allowing her to go to Foster care. He felt like she had to come with him and he was the only person that could keep her safe.