I'm not in your shoes, but from the information given I suspect "Pita" knows exactly what she's doing.
Ever watch CSI? There was an episode where a character, lab tech Hodges, tried to do this. He brought lab results straight to the boss, instead of to the investigators assigned to the case. When the boss asked him why he didn't give the results to his team, Hodges replied, "Oh, (Boss), I couldn't find them; I guess they're taking another break. But I thought you'd want to know right away..."
It's that attitude, the casual little comment, that's a deadly weapon in a workplace. "Oh, I didn't want to bother her, she looked so overwhelmed, so I came to you" or "Gosh, I couldn't interrupt a phonecall from her son; it might have been important, and..."
"Pita" seems to be setting you up for a fall, in a totally passive-aggressive manner. Document everything, and groom your approach to your boss's personality. Maybe ask him to tell you when the meetings are, because Pita "is too kind to interrupt you" or something, but you really need to know X thing...
Just my two cents,