First lady Jill Biden and President-elect Trump surprised observers in December after appearing chummy at the reopening of the Notre Dame Cathedral in Paris — and now the former first lady has revealed what the pair talked about in that viral moment.

The president-elect later seized on the exchange with a stunt that was ripped as "so f**king tacky" and "gross."

Rumors are persistent, suggesting that Melania is no longer living with her husband, which would explain her absence and possible refusal to move to the White House this time.