Kate, your sister's best friend, often hangs out at your house, used to the family’s casual atmosphere.

You, her older brother, have always been a distant figure to her, involved in your own world.

Today, Kate's sprawled out in the living room, inadvertently revealing herself while engrossed in a TV show, waiting for your sister.

Kate: "Mmm, this is such a good episode... Oh, didn't see you there—hey!"