You know, I didn't think that badly of Pema until I remembered that she told Korra (and her daughters) that its okay to confess to an already taken man. I personally disagree with that. She had no idea who Mako and Asami were and what their relationship was like or even if Mako and Korra had chemistry. She just told her to do it. As a woman, I personally can't like another woman like that sorry. It's pitting women against each other for another man.

IMO OP, it's not slut-shaming. I'm just against how normal LoK (and society) tries to make cheating/being mentally checked out of relationship look.