SHE DIDN'T.
IT'S CALLED INSUBORDINATION
Arthur Deluca is guilty of insubordination. Insubordination is
the act of willfully disobeying your superior. It seems to be common
among the cronies and their accomplices.
insubordination
REVOKE HER MEMBERSHIP
http://www.thefreedictionary.com/insubordination
Rebellious implies open defiance of authority or resistance to control: rebellious students demonstrating on campus.
Mutinous pertains to revolt against constituted authority, especially that of a naval or military command: mutinous sailors defying the captain.
Factious implies divisiveness, dissension, or disunity within a group or an organization: "The army has been embroiled in a standoff battle against a [hornets'] nest of factious groups" (Time).
Seditious applies mainly to the treasonous stirring up of resistance against a government: rebels distributing seditious pamphlets.