The relationship between Damon Salvatore and Elizabeth Forbes. Damon gains Liz's trust during Season 1 and part of Season 2. He pretends to help her track down and kill the vampires in Mystic Fall to cover up his tracks and make sure that they don't suspect that him and his brother are vampires. Although what Damon did not expect, is finding a friend in her, and Liz has even called Damon her "closest ally". Now that she knows that he is a vampire like her daughter, the status of their relationship is unknown. It seems now that Liz has come to terms with Damon's vampire nature and accepts him, although she's still not too keen on vampires as a whole. Quite frankly Liz doesn't know that Damon abused her daughter.
Liz: "Keep Caroline away from me, please. I don't want to see her."