Honeymoon for One by Beth Orsoff

Opening lines:

"How exactly is an emery board supposed to help me break out of jail?"

I don’t know," Jane said. "It’s what they always smuggle into prisoners in the movies."

At that moment I wanted to throttle Jane, but since I was on the inside of a jail cell and Jane was on the outside, it was unlikely to happen. "A metal file," I hissed. "Not a paper one!"

"Where was I supposed to get a metal nail file in the middle of the night? You know they don’t let you carry that stuff on the plane anymore. Terrorists could use it as a weapon."