Another travel vs. jump ball

[Smitty]

I had a girl driving the lane, picks up her dribble and holds the ball down by her hip as she begins her steps to start a layup. She is not airborne, but has started her shooting motion. A defender reaches over and gets a hand on the ball, but it is not a case where I would call a normal jump ball. But the shooter loses her rhythm and ends up taking an extra step while she tries to regrip the ball, while the defender's hand is still on the ball, but not holding the ball. I called a travel. Wasn't a popular call. Did I get it right?