OK. This is set after Twilight and before New Moon.
Chapter 1 EMMETT'S LITLLE FRIEND
POV Alice
We had been hunting, leaving Emmett alone at the house. He said Bella could come by if she got bored with her 0% of a social life. Edward had snarled at him.
When we walked in I immediately saw the future go blank. I ignored it for the moment being as there was a problem. Emmett was sitting on the couch looking at Sports Illustrated. Sitting next to him was a girl who looked about eleven staring at the blank TV screen laughing occasionally.
"Um… Emmett? Who's this?" asked Esme uncertain ally. Edward kept Bella behind him while Bella peeked around his shoulder.
"Oh this is Letty," Emmett said turning on a football game. Letty immediately became bored of the television and started to sing quietly. "Big Bird's on the run, duh duh, duh duh, duh. Elmo's got a gun, duh duh, duh duh, duh. But what made Elmo snap, duh duh, duh duh, duh. Was dealing with Big Bird's crap."
Edward shrieked, "What's wrong with her mind?" Emmett shrugged and said, "Oh she's a mental patient."
Edward took a deep breath and said, " WHY DID YOU KIDNAPP MENTAL PATIENT? DO YOU HAVE ANY IDEA HOW MUCH DANGER IT COULD PUT BELLA IN?" He was screaming and shouting and Letty started to cry.
Emmett went over to her and set her on his lap and rubbed her back. I could hear Rosalie growl quietly. "Now look what you did. You made her cry," he scolded.
Jasper POV
"Letty isn't dangerous… usually," Emmett said after he located a lollipop and stuck it in the girl's mouth. She twirled it happily in her mouth. But I could only tell she was happy by her twirling. It was like she had no emotions.
"Alice. I can't get anything," I whispered to my wife. "I can't either. It might have to do with her being mental or she might be a more advanced case of Bella." I nodded my head and took a steep back from her shoulder.
"Emmett," Carlisle said in his We-Need-To-Stay-Calm-Right-Now-Or-It-Will-Get-Worse voice. "Why did you kidnap the mental patient?" Emmett began to explain his adventures.
"Well… It's a really long story. First I was walking around outside by the mental asylum, being bored, and this girl," he pointed to Letty, "ran up to me and started giggling. Then this weird security guard comes up, grabs her and runs back inside with her kicking and screaming. So that made me curious so I snuck in and spied one her and the other mental patients and they were being big meanies to her so I snuck her out and by the way Carlisle do you think you could get her some more of her meds? She flushed the last bottle down the toilet."
We all stared at Emmett. "Umm… Yeah I can get more of her medication. I'll need to hack her files and find out what all she needs." He ran off to his study.
"But she could still be dangerous to Bella," said Edward being a prat. I thought loudly. Just let the girl hangout here for a while to make Emmett shut up. And if she is dangerous I doubt that little human kid could overpower seven vampires and even if she did Bella can handle an eleven year old.
Edward glared at me.
And that is exactly how we indeed up with a mental patient in our family.