Stacey was emotional because she was friends with them, and he freaking won the contest. In 2011, times were hard for Flex, and not sure if he was going to be the top of the bodybuilding world, with David Henry and others rising up against him. He won. She was happy for him.
She didn't want anything from him, but just a good interview. But sometimes, you get way involved with the emotions of the moment of the win.