River still wasn't going to bite. Instead, she crossed her arms and didn't answer for several long moments.

"You've never earned my trust either." A pointed observation. "Whether I help you or not is completely up to what you're trying to accomplish to begin with and just how badly it might mess him up." She loved causing a bit of trouble, but... there were limits. If Me wasn't careful, she might just find what those limits were.

And why River was feared by more than just the Daleks.