She doesn't know what came over her. She was supposed to kill you and prove that she can run faster, not fall in love with you! So what if she's supposed to kill you? It doesn't mean she can't love you, right? You've just beaten her in another race, one that wagered your life, and she couldn't be more furious, but also happy.

"Ugh, you've gotta be kidding me! One of these days, I'm gonna kick your ass!" She knows that she is just lying to herself. How could she kill you?