NEW YORK — On Tuesday, just two days after their first wedding anniversary, a couple in their 20s invited a small group of friends and relatives to their two-bedroom condominium on the Upper West Side.

After clinking glasses, they made an announcement that caught the husband's male friends off guard but surprised few of the wife's female friends. Yes, they were expecting, in the spring, their first.

That was Donald John Trump Jr. and Vanessa Trump doing things the normal way.

The next night, Donald Trump Jr., dressed in a pinstripe suit, stood before the cameras in a crowd of models and second-generation New York social personalities at a cocktail party at a Manhattan art gallery to celebrate his wife's appearance on the cover of Hamptons magazine.

As he forecast the joys and challenges of fatherhood, reporters attempted to calibrate, by the size of the bump beneath the belly of Vanessa Trump's teal Issa London gown, how long the world would have to wait for a new playmate for Barron, the 8-month-old son of Melania and Donald Trump Sr.