I think laila was at her best in the haldi scene. She was in fact the injured woman. The woman scorned. She held him accountable. And yes, he has to clear the books about her to
Paro. However, her returning for him was a completely wrong move.
At the end of the day for him it was jst consensual sex, and yes, some guys are cold like that. She liked it that way, matched his animalistic tendencies with her own. He never strayed from her for eight years, she was in her comfort zone. But she did not count on his meeting his soulmate, flawed and corroded by poison as he was. And thats what got to her.
Within a few days of capturing Paro and moving her to his house, he stopped going to her for sex. Her anger at his asking for clothes did not move him at all. And once Paro was masqueraded as his mangetar, he completely shut her out. No explanations. I think too that the least he could have done was tell her, but he had to be very careful about Paro and Laila forced his hand.
People seem to forget that Rudras world turned upside down when he met Paro! As did hers. Nothing was the same anymore! But the baggage remained, and had to be faced.