With her full-time partner, John McEnroe, 27, still on a six-month hiatus from tennis, Tatum O'Neal, 22, is watching the every move of the other man in her life, 6-week-old son Kevin Jack. No telling what Little Mac did to elicit such a look of loving delight from O'Neal. But the actress was a picture-perfect proud mom as she snacked at a Manhattan café.

Dad, nowhere in sight, was apparently tuning up his game. In two weeks he'll play an L.A. exhibition match with archrival Ivan Lendl. Then it's on to a tournament in Stratton Mountain, Vt. and finally to the U.S. Open late next month. Tatum meanwhile can count on a continuing volley of questions about when the pair will marry.