The rules state this
13. Employees, officers, directors and agents of CBS Broadcasting Inc., Our House Productions, Inc., Endemol Entertainment USA, Inc., and/or of any of their respective licensees, assigns, parents, affiliated and subsidiary companies
and the immediate family (spouse, mother, father, sister, brother, daughter or son, regardless of where they live) or members of their same households (whether related or not) of such employees, officers, directors and agents are not eligible to be participants on Big Brother or participate in the application process.
I think she probably fits in there somewhere, she did help cast Survivor!