Who else would it be knocking on her door in the middle of the night? She doesn't know too many people here, so barring someone being lost it would only ever be Klaus. When he asks to come in her face softens, and she gives his arm a soft tug.

"Yeah, come on, get in here."

She shuts the door once he's through it, and gets him a glass of water without the question being asked. Some things, you just know to do in a situation like this.

"Okay. Talk to me."