Kate isn't happy with the situation either, but she hasn't exactly been trying too hard to hide that fact throughout the conversation. She hates leaving, and she hates the thought of them leaving, but she knows it's time to lock up her pride and do what's best for everyone.

She nods stonily, dropping her attention back to her boots when he asks them to keep in touch. Despite Doc's claims, she isn't as optimistic about ever reviving her ties to Milliways. It's not fair lying to Bill, or giving him false hope, but she's not going to openly argue with Doc in front of him. This will save them all time and discomfort.

"I'll be fine. We'll be... fine," Kate mutters, hugging her arms around herself. "I don't think there's any need for goodbyes, Sheriff."

She can't see Boo, and he's right, anyway. It would be best if she didn't let her know she was going. As for Kate... well. She's sure the woman could care less about a goodbye from her. But Doc, on the other hand...

"Might be best if y'just kept this to yourself, anyhow. Less people who know, the better. Just you concentrate on makin' her happy, gettin' safe, and once y'are then y'can worry 'bout the specifics of our partin'," she suggests.