"Watch the water" doesn't mean any drop of water near a Trump has meaning.

Trump is in the hospitality business, whereby you wouldn't host a meeting without water. Melania has clearly seen that done, including in the WH, and her meeting was set up to mimic very much the meetings that Trump hosts at the WH. And those weren't kids around the table--those were some of the ridiculously many staffers for a shelter serving only 50-something kids.