The question for you is, "can you listen and understand to the words coming out of her mouth instead of staring at her body parts?" If she becomes your flight instructor, she probably won't go out with you because it's unprofessional. If you want to date her, find another CFI.

If you want to get to know her, you could get some flight instruction from her. Then after a few hours tell her that you need to switch to another CFI because you find her attractive and can't focus on flight training with her in the flight deck.