I was not surprised that Hillary Clinton stayed with Bill Clinton after his affair with Monica Lewinsky was exposed (nor the affairs before that). I read her, then and now, as an equal player in a power couple. I am sure she was mad as hell, and with ample justification. I don't know how, exactly, they reconciled, though I believe their reconciliation is real.
Josie Pickens makes a similar argument in The Daily Beast about why Beyoncé would stay with her husband after he cheated on her - as she seems to be saying in the album/film Lemonade. She is an equal player in a power couple. They still have things to do together.
A woman can now choose to stay in a marriage after partner's affair because it's good for business and her whole life trajectory.