You could definitely make that argument, not 3 steps, but she re-gathered both feet, including her pivot foot in setting her feet for the shot - that type of move is not always called a walk (almost never in the NBA), although it technically and clearly is. On the just prior play the Indiana post just as clearly shuffled both feet, including her pivot foot, in setting her feet for the shot that she got fouled on (and converted foul shots) to give Indiana their lead (the Iowa coach went ballistic and the announcer agreed it was a walk on the replay). But again, not all things that are technically walks are called, so turnabout was fair play in this game. Walking that is called is normally a visual reaction (of the ref or other viewer) - it's like pornography, hard to define, but you know it when you see it