Beckett's mouth works open and closed a couple of times, trying to find all of the reasons why that would be one of the most disastrous ideas as she sets up a position leaning against the opposite counter, the movement somewhat helping to line up her thoughts in proper order.

"Well, for starters, what about the fact that the NYPD seriously comes down on interdepartmental relationships?" she points out, though the observation sounds half-hearted when it finally leaves her lips. "We work together, Castle. There's more at stake here than just - if Gates finds out, she could find a way to make sure you're not a part of the team anymore." That, she knows, would kill him as much as it would affect her, even if she doesn't say that out loud.