However, Amelia is unfazed.
She says Bettys last high is like a demon fighting to stay alive, but shes the exorcist.
Demon Betty eventually locks herself in the bathroom and sneaks out of the window.

Credit: John Fleenor/ABC
When Amelia realizes shes run away, she blames herself and retreats to an Addicts Anonymous meeting for support.
Webber thinks the terms are reasonable, but Bailey isnt ready to give in so easily.
Arizona is also feeling overwhelmed.
Sophia was suspended from school for stealing field trip money.
She checks herself out of the hospital and goes home.
Determined to do whats best for the patient and the baby, Dr. Robbins makes a home visit.
Helping her patient overcome her fear also led Arizona to the solution to her parenting woes.
She stopped cashing his checks because she didnt need them.
When Alex finds her at the library, shes overjoyed to see him, but hes frustrated.
Why didnt she call him?
Why didnt she let him know she was doing better?
His anger nearly pushes her into an episode and Ellen asks him to leave.
Back in Seattle, Webber is still trying to convince Bailey to accept Dr. Roys terms.
However, she will allow him to return to work on a one-year probationary basis.
Needless to say, Dr. Roy humbled himself and accepted her apology.
Karev and his mother part with a sweet goodbye.
My sweetest boy, she says.
Its nice to see these two getting along again.
Remember I said that Arizona found a solution to her parenting woes?
Well, youre not going to like it.
And our favorite pediatric surgeon is going with her.