sister

YEP that kid's screwed

ON HOTH IT IS hoth, not even once

PROM because sometimes you can't afford to bring your sister.

SISTAH making the title ticks work for you

WHO SAID that was his sister's room?

YES. yes it is

I HAVE YOUR SISTER ALL TIED UP with this enthralling game of chess that we're playing.

CONTEXT is there ANY in which this is ok?

HOW DO YOU KNOW ? did you actually drink alcohol free beer you sick bastard?

THAT AWKWARD MOMENT when your girlfriend's little sister has bigger bewbs than your girlfriend.

STEP-SISTERS no risk of genetic mutation in the offspring!