[Andy]

I don't think so.

At this point, you have called the IP once...maybe she did it without thinking.

The second time, you mentioned that your perception was that she was trying to hide her actions from you...you called the IP again and enforced the penalty.

Since you believe that the pitcher may be deliberately violating the rule after your explanation and enforcement, it may be advisable to talk to both the pitcher and her coach and inform them that if she places a foreign substance (spit) on the ball again, you will have no choice but to eject her. Of course, you have to follow through if necessary.

The above is my opinion only...the rule basis is there for an ejection on the second offense and I would not have a problem with an ejection at that point.