Let’s be clear about something. There are two separate issues regarding Representative Katie Hill’s resignation.
One is the allegation of having an ongoing affair with a member of her congressional staff. She denies this. But if it is true, it is improper for a supervisor to have that kind of relationship with an employee. (Even by the rules of the House of Representatives, yes.)
But the other part is the public release of photos of, and allegations regarding, her private life as an openly bisexual person in a consensual polyamorous relationship. Which is only the business of the people involved. And with which there is nothing wrong.
Don’t conflate the two. The latter may be more sensational, but only the former is relevant. Outside of her professional life, she — and we all — should get to live and love however we best see fit.
(I am also bemused by the commentators saying that her private life left her open to blackmail. Apparently, they don’t understand what “living openly“ means. You can’t be blackmailed for something you’ve already told the world about.)