You go home, and while cooking for yourself, you hear some strange sounds in her bedroom. You don't immediately bust in her room, since that would be incredibly inconsiderate - and you have your cooking to take care of, too.
She eventually leaves home for a while and you head in and look around her room. You find nothing weird, but you begin to think about her strange behaviour over the last couple of months - and decide to inspect her computer just in case; in hopes you can find out the source.
It's mostly pretty standard stuff for a teenage girl - facebook, tumblr pages, youtube videos, random forums...but you find something that sticks out like a sore thumb - BLACKED videos. In fact, she watched them an hour ago; right about when you heard the weird noises.
What would you do? What can you do? Will you swallow your pride like a faggot and live with the fact that your beautiful, cute sister is into black men, or will you explode at her because of her sexual preferences like some insecure bastard?