A/N: You know what I said about not writing until more episodes came out? Well, I guess I was wrong. This kept hitting me until I could finally put it on paper. I'm sorry it's so short, I really tried to make it longer, but this just seemed to flow. Fattening was just too unnatural.

She Thinks

I know my sister. She thinks I don't, but I do. I know everything because I know her.

She took her first steps toward me. I saw her hesitate before tipping drunkenly to her other foot. I saw that, and I remember it, so I know her gait. I know when she's twisted her ankle or stubbed her toe. I know when she has to walk gingerly. I see it, no matter how much she tries to hide it.

She thinks I don't notice that every once in a while, she comes home smelling of concealer. She thinks I don't see the bruises around her neck or the marks on her arms. She thinks I don't catch her wincing when she bends down or bumps against something.

She doesn't expect me to find the gun taped under her dresser. She doesn't expect me to see that she sleeps with a knife under her pillow.

She can hit all the cyber ducks on any level. She misses one or two only so that I don't notice all the others are bull's-eyes.

She walks around the house every night. She never used to do it, but now she does. She likes the night sounds, she says, but I know that's only part of the reason.

She never used to be able to lie. I used to say I could always tell when she'd taken the last cookie, but that was before she left for three months for "research". Ancient towns buried under layers of sand don't teach you how to lie.

I know my sister.

I know she's lying, and that's what hurts more than the knowledge that one morning she'll walk out of the house and not come back.

But that's the life of a CIA family.

And she thinks I don't know.

A/N: Well? I've never been able to keep a secret, though I must say, this beats most of my "I know who you are" ficlets. Oh, before I say goodbye, I want to say thanks for the great responses to my other stuff. It's really been a terrific experience to get so many reviews and notes so quickly. And thanks to all the other CA writers out there. You guys are really inspiring. I've read them all.