Anna was hoping the odds were in their favor, but she knew Katherine far too long, and far too well to underestimate her. She couldn't help but think that Damon and Stefan kept failing to take her out because they weren't properly motivated to do so. Maybe they were both still hung up on her in some weird way. She never pretended to understand the Salvatores. She didn't really care to for that matter.
Elena was right about that, and she wasn't surprised the brunette had come to the same conclusion that she had. "Agreed. Her arrogance is a weak spot." But she wasn't entirely sure about the allies part. "Elijah is here, too." But she was pretty sure Elena knew that. Anna wasn't sure how Elijah would take them killing Katherine, but frankly she didn't care that much about that, either. If he came after them, what could he do? Stake her again?
Elena's suggestion of torturing Katherine genuinely surprised her and she arched an eyebrow. It wasn't that she was against the idea of causing Katherine a lot of physical pain. In fact, she didn't mind it at all. Why should she get off so easily, after everything she'd done? Anna had never actually tortured anyone before. She'd never been interested in causing someone pain for the sake of causing pain. But Katherine wasn't just anyone. "Sure. Why the hell not? She deserves it." She shrugged. If Elena wanted to torture Katherine, she certainly wasn't going to stop her.
Apparently that old saying was true: the enemy of my enemy is my friend. Or at the very least, an ally, no matter how temporary.