That was an especially dumb move, telling she had the idol that early. They barely know each other's names yet. The idol's been used as a bargaining chip in the last couple of games, and Kristina must have thought she was doing the smart thing. She won't be around long.
I felt like cheering when Francesca spoke up and called Jeff on his statement that Boston Rob and Russell were there to help. If those two sleazeballs were there as advisors and were not competing for the million dollars, THEN they'd be there to help. Unfortunately, speaking up was Francesca's undoing. The only way she'll stay in the game now is if she defeats every other person voted out, and the glimpses we got of the "duels" looked pretty physical.