The girl clearly isn't in love with the Summers boy. That makes this easier.

"You're leaving New York. When you're done dying your hair, I'll cut it, photograph you, and finish your new ID. Pick a name. We'll put you on a plane to California, where you can start a new life."

She crosses her arms, looking sternly at the girl. "You will never see Alex Summers again. If you do, we will know."

Because we'll still be here.

"And if that's the case, we will kill you both. Do you understand?"