She knew Hilary wouldn’t give Jack a second alone, and she takes action! Red makes sure to create a harmless diversion to get everyone out of the building so she can sneak in and steal the incriminating evidence herself!
Phyllis is doing everything she can to make herself relevant in Jack’s life but helping him behind his back may hurt her efforts even more. While her heroic efforts don’t go unnoticed, she may not get the recognition she was hoping to get. Jack doesn’t want Phyllis around, and her intrusion in his life (even if she managed to save his behind) isn’t welcome.