Originally Posted by
Productivity
(effectively she has no security and no immigration to clear). Is my assumption correct?
I'm not sure if AMS considers the US a clean origin. If they do, there won't be security control upon arrival. If they don't, she will have to go thru transit security. Some AMS-loyal frequent-flyer might clear that question.
I would meet up somewhere near the shops before heading to the gate. That's the area you end up after going thru security.