Inbounding after a made basket, 2

[bbcoach7]

After the made basket- Inbounder steps out of bounds with the ball and no one is open. A team mate steps out of bounds along same end line and original inbounder passes the ball to this team mate who has stepped out.

Here's my question- does the player stepping out of bounds have to establish her feet out of bounds before she can catch the ball from the original inbounds passer?

I coach JV and we do this often in practice because we scrimmage varsity every day and we have to use everything we can to compete. Sometimes the player stepping out will be in the air (feet haven't landed OOB yet) as she catches the ball, and I suspect it's a violation.

We've never actually had to do this in a game, as nobody has pressured us like our own varsity.