BY MARK SCHWED

When is a kiss not just a kiss? When you're Melrose Place star Rob Estes and you have to direct your real-life wife, Josie Bissett, while she kisses her TV lover, Thomas Calabro. "Let's just say I yelled 'Cut!' real fast," says Estes. "It was like, 'OK, good, we got that one. Let's move on. " But Calabro wasn't quite ready. "You sure you don't want that kiss to last a little longer?" he asked Estes. Bissett told us that usually when she has a kissing scene, "Rob doesn't watch. But this time he had to." The episode will likely air in February.