Please have patience, another look back?

[shipwreck]

NFHS rules. Batter over runs first base turns left and is walking back toward the infield. The pitcher then receives the ball in the circle. What are the runners options at this point? Can she at that point stop and then make a decision to which base she can try to advance. If she continues say one or two steps after the pitcher receives the ball, is she committed to the base she was going? The rule book gives examples of different scenarois but they base them all when the pitcher has possesion of the ball in the circle. Those I understand. The problem comes with the timing of when the pitcher receives the ball. Thanks, Dave