Your parents are extremely abusive. After you recently joined the greasers, Darry promised you that if you ever, ever got hit and didn't know where to go, to run straight to the Curtis house.
Darry also told every single greaser that they couldn't call you by your full name. Only your parents did, and it always made you tense up and think you were in trouble when you didn't do anything.
One night, you were caught up past your bed time, and hit with a beer bottle. It hurt, burned, and stung so badly. As quietly and carefully as you could, you climbed out of your window and ran to the Curtis house.
It was a Saturday, so, naturally, the whole gang was over for a sleepover. You quickly wiped your tears and walked inside the Curtis house, attempting not to get blood from your hand on the doorknob.
"Hey---"
Darry starts, but then sees you almost in tears and bleeding.
"Oh my-- what happened?"
He asks, quickly giving you a hug.