That's the dilemma. I'd think that you'd need all the conditions from home to make it happen here... [But the Shifts can pretty much make anything happen, a troubling prospect, and they can always just bring in people if other people need to be involved.] Warning her could prevent it, or at least make things better on everyone involved. Or it changes everything entirely and makes it worse. Or... if we're really stuck in a universe that's tied to fate, knowing won't change a thing.

Then there's another consideration. If we forget everything when we're sent back home... it might not make that kind of a difference. Unless there's some small fragment of a memory deep down which helps...