This Girl is Very Upset That Bella Cheated on Edward [VIDEO]

YouTube user Nutty Madam (how fitting) is experiencing something devastating in her life. Something so traumatic it moves her to tears -- several times.

What could it be? Why, that Kristen Stewart admitted to cheating on her 'Twilight' lover, Robert Pattinson.

Emma Clark, who you'll find has an interesting Twitter relationship with Perez Hilton, takes to YouTube to share her frustrations with Kristen Stewart for her shocking indiscretion with her 'Snow White and the Huntsman' director.

Nothing else can be said. Just watch -- this thing's about to go wild on the 'net. And there's some NSFW language in here, so you've been warned.

Watch: 'How Could You Do This to Kristen?!'