Really unexpected lol
I don’t think that was the point of the story or plot twist. I think they just show that characters aren’t just black and white. Some characters show they had reasons for what they did, whether it resulted in bad or good choices. Despite the sister pushing him away first and making him feel that way, he still decided to cheat before breaking up. See how easy it was to break up, which he could’ve done before doing anything with anyone else. So he’s still a bad person, along with how he cheated her again on his mistress.
The sister showed that she truly did suffer but also had her own terrible side. She still did get pregnant and lost her child, and was betrayed.
Are we being fr rn …… of course the author span the story around to make the man the victim and all the women the villains. Wow what an awful plot twist