You just read the spoilers
(about the whole David's Mother part)...
I have no info on the coffee part
Nope ... no spoiler. Just kinda makes sense when you look at it as it was revealed in the episodes:
Sun gets shot - (3/4 eps back) Guess she and Jin are going to the hospital and run into Jack.
Locke gets run over - (2 eps back) Guess he's going to the same hospital.
Ben in ambulance (last ep) - He's probably in the waiting room at the hospital.
Sawyer / Miles - (last ep) Police are probably going to have to do some investigation at the hospital.
Jack / David - (last ep) End up at hospital.
David's Mom - (last ep, foreshadow) Will probably have to end up at hospital to pick up David.
Given the limited number of eps left, you have to assume that she is going to be someone we know. Juliet really is the only "holdout" in the ATL.