“What possible circumstance?”

He was good looking (or good enough for her that night), easy, available, and in her line of sight when she decided she wanted some. Their lack of any future relationship shows she just hit it and quit it.

Male “heroes” bang treacherous ass all the time and no one says shit. Why can’t a “good guy” who’s a woman decide she wants some shady pipe laid?

This was completely in character for her.