Could you be just a little more vague?
From what you are describing, one thing is certain, she won't be taking a base. She will never be taking a base if she leans into the pitch. The only other thing that is certain is that I will have a dead ball.
Now, without more info it would be difficult to say for certain whether I would call a ball or a strike, but, if she did lean as far as you stated, it would almost seem certain that she is in the actual strike zone. In the scenario that you present, I would be sure that if I was going to err, I would do so in favor of the defense, since it appears that the batter is leaning into the pitch with the obvious intent of getting the ball to hit her.