Barney crosses the wrong person when he hits on a gorgeous woman who walks into the bar. He managed to get her back to his place, but she didn't give into him. She was too beautiful for him to give up, so he carried out the charade until she fell for him. He finally had her, but after he had slept with her he dropped her like a hot potato. He thought it would be okay, but she was a vampire. Something he didn't know. She could find him anywhere. She could compel him. The worst part was she actually loved him. Now she just had to figure out what her revenge would be. Kill him or change him or…. She'd come up with something that would serve him right. An idea struck her when she saw Barney hitting on a new girl. She quickly compelled her to be the clingiest woman ever; to never leave Barney's side, no matter what. Now all she had to do was sit back and watch.
She let it go on for a week before stepping back into his life. "Having trouble?" She asks Barney who was sitting next to Clara as she found out. "Yes. Save me" He begged in a whisper. "Apologize for making me fall for you then leaving." Barney's face changed "You fell for me?" Rebecca put on her best bitch face as Barney talked "I'm sorry, I really am, but why would anyone fall for me?" Rebecca let her face soften "You were sweet. I know now it was all an act to sleep with me, but in the moment you were super sweet." She got up and pulled Clara away with her. They stepped outside and she set Clara free of her compulsion. She told her to go home. She walked back in "You're free" she said to Barney "Clara won't bother you again." She started walking away when Barney stopped her "Will you have dinner with me?" Rebecca turned. Her weakness was her heart, so she only nodded before leaving.