I think Jack's in as much trouble as Juliette is, despite his illusions of "I'm the doctor with the biggest saviour complex on the island ergo I can single-handedly make or suspend decisions effecting everyone's lives". Any Lostie to buy his and Juliette's weak explanations needs a huge mark on his/her tent. Juliette admitting to Jack or the rest of the Losties about the 'other side of the tape' means nothing much- might as well be a part of her worst case scenario. Did she assume that Ben would take no action based on the information she was to collect for him? She plays double sides, how can she be trusted?

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"Bear...? Is that you?"-- Hurley S03E4