A) let her stay

"Fine I believe you. As much as I would like an explanation we should probably leave."

Lizbeth nodded in agreement. "Alright I know a shortcut through the woods that will take us to my cousin's house."

"First, there's no way in hell I'm going through the woods with a serial killer on the lose. And second shouldn't we get a weapon or something first?"

"The woods is the fastest way to town. But whatever hurry up and grab a weapon while I think of another plan."

While Lizbeth composes another plan you:

A) go to the kitchen and grab a butcher's knife

or

B) go in your father's room and look for the gun