Partner Problem

[rainmaker]

First free throw of two. I'm trail. Shot goes up, shooter leans... way... over... but doesn't actually step until the ball is pretty much in the net. Partner (on lead, remember) blows whistle, waves off the basket, and starts to give the ball to the other team. I tweet, we huddle, we disagree, but I'm the Referee, he's the umpire, so I go to the table and say, (both coaches hear me) "The basket is good, he didn't step over until the ball was in." The defending coach says, "You can't overrule him!!" I say, "Coach, I didn't overrule him. We disagreed about the call, I'm the Head Ref, and I have to decide." He didn't like it but he sat down and didn't complain any more.

Did I handle this correctly?