It is the only way your dispute can be settled. The only way that you and she can choose which of you can claim Misty as your own.
And though in your mind it is clear how you and your rival must compete. How your bodies must meet to pit desire against passion and need against love.
She does not understand — does not comprehend.
So you must show her, before you destroy her. Must teach her, before you you leave her quivering in a puddle of her own defeat.