Caroline pulls open the door, but Katherine's not right at the opening. Elena calls out to her and tries to get Caroline to leave, but she stays right where she is. Finally, Katherine drags her desiccating derrière to the door, and in a dry, thin voice, she rasps: "Hello, Elena." Girlfriend looks rough. She's not even wearing any shoes. Commercial.
Kat wants to know if Elena came to watch her wither away, and she wants Caroline gone, now. Caroline stands her ground until Elena assures her that as long as she remains on the other side of the enchanted doorway, Katherine can't harm her. Oh, honey, that's not true. She can fill your head with lies and inaccuracies. Once Caroline leaves, Katherine tries to talk to Elena about Stefan, but Elena ignores her and starts pulling some things from her bag of tricks, including a pillow, and the Petrova book Damon nicked from Isobel's office. She wants Kat to tell her about Satan Klaus. Kat doesn't seem inclined to talk until Elena withdraws a bottle of blood from her bag. At the sight of it, Katherine Stealth-Salvatores to the door, but the magical barrier keeps her safely in her place and off Elena's delicate neck. Elena pours a couple of sips of the blood into a plastic cup and using a stick, slides the cup to Katherine. I love it when heroines aren't stupid. After Kat downs a couple of shots, she explains that she met Klaus in England in 1492 when Columbus was sailing the ocean blue, in order to exploit and abuse Native Americans and steal their lands. [Um Cindy, you realize you were channeling Willow's mother for at least part of that, right? -- Buffy] Oh hush, you. Willow's mother was talking about the Pilgrims.
It seems Katerina's parents kicked her fornicating fanny out off the farm, she fled to England. It's there she met nobleman Satan Klaus and caught his eye, She was into him, too, until she realized he didn't want to court or marry her so much as he wanted to sacrifice her to lift the Sun Curse against the vampires. Being resourceful, Kat stole his moonstone and ran away. Via flashback we learn that Satan Klaus sent Elijah and some other minions after her, but Trevor, who was in love with her, helped Katherine escape. He diverted the search party's attention and then pointed Kat in the direction of a safe cottage.