Because in Revenge, the central character has an impossible, freakish ability to be all-knowing, all-seeing, and perfect when it comes to unleashing her revenge schemes.
Emily wants to end the cycle of revenge.
Emily storms in on Victoria and David.
At night Nolan came telling her that he could help but she refused.
He knows her because her dad invested in him before he became super rich.
Banks and that her tape was the only one that didn't appeared, suggesting that she had destroyed them.