Kate loses Aaron in grocery store, woman resembling Claire finds him

After Kate leaves the others at slip 23, Aaron wants some milk. Kate stops at Tim's Grocery Store to get him some milk but he decides he wants a juice box. When Kate stops because Jack is calling her phone, she loses Aaron. She rushes through the store looking for him and as she's telling the manager to seal off the store, she sees Aaron. He is being led to the front of the store by a woman who looks like Claire from behind. Kate freaks out and grabs Aaron. The woman tells her that she found Aaron in the fruit section was taking him to make an announcement. Kate is freaked out and barely says thanks.

Kate at this point is incredibly paranoid about someone taking Aaron. This event seems to be the precursor to her leaving Aaron and going back to the island.

Sun talks to Ji Yeon, threatens to shoot Ben

Sun is sitting in her car where we last saw her in episode 4 "The Little Prince." She receives a call from her mother Mrs. Paik (we've never learned her first name) who asks when she is coming home and tells her that Ji Yeon wants to talk to her. Sun tells Ji Yeon that she will be home soon and that she's found a new friend for her in America, Aaron.

Sun then proceeds to get out of the car with the gun she received under the chocolates and proceeds towards Ben. She holds the gun on him as Ben says "I didn't kill your husband Sun... and neither did anyone else because he's not dead." He then tells her that he can prove Jin is alive. Sun's eyes begin to tear up.

Most of the Oceanic 6 and Ben meet at slip 23

Jack and Kate arrive at slip 23 first. Jack shows Kate the address from Tony's (the operative that posed as a nurse) pocket and tells her what happened. That's when Sayid and Ben show up in the van which in turn causes a stand-off between Ben and Kate. Kate accuses Ben of being the one trying to take Aaron and Ben confesses that he did do it. Meanwhile, Sun is in a car watching what's going on. Aaron is in the back seat. Sun has the surveillance photos and the gun in the passenger seat. She takes the gun and gets out of the car.

Will Ben be able to convince Sun not to kill him? During this scene, all of the Oceanic 6 except Hurley are together. It would seem that Ben's plan is falling into place.

There's a mistake with the address. If you look at the original slip of paper when Sayid takes it out of Tony's wallet, it's written in a different handwriting and with a different pen.