Lanie: You've gotta take care of it. This is Meredith we're talking about. The deep-fried twinkie that Castle has ex-sex with whenever she rolls into town.
Beckett: Lanie. Look, I trust him. He's not gonna have sex with her.
Lanie: Fine. Let's say it isn't about sex. It's about boundaries. Meredith is marking her territory. You can't just let her waltz in and out whenever she pleases.
Beckett: He's in a catch-22. Alexis is sick--
Lanie: Doesn't matter. This is a war, girl, and guess who's losing.