It was disappointing to learn on Being Human Season 4 Episode 5 that it was so easy for Kat to walk away from Aidan after learning he was a vampire.
He told her the truth, showed her his black eyes and she was scared to death. End of story. He toyed with the idea of compelling her to be with him, but he never went through with it. Turns out, boys and girls, that real life ain't nothin' like Twilight. Damn.
Who saw that coming?