Inbound
 

A1 legally saves ball from going out-of-bounds and momentum takes her out-of-bounds. Ball is loose on floor and A1 with one foot down returns to tie up B1. I ruled jump ball.....does player establish inbound status with just the one foot down?

as long as her other one is not touching out of bounds.

Yes. As long as the player has something inbounds and nothing out.

Good call.