agree this is likely a tall tale, but the premise of the woman turned on is sound.
The whole "to the victor go the spoils" aspect of it.
I was working on a story for a lass in the UK...premise being that her boyfriend is hurt in a sporting event. She found her self disturbingly attracted to her guys opponent.
As I gathered details it became apparent this story was real, but unconsummated (so far and that is tenuous at the moment). I wound up also getting the opponents take on it. She is noticeably turned on MOST when he goads her about her boyfriends injury.