I think the haldi incident ...when Rudra cried loud and clear that the friendship between them is over!!!And by friendship we all know what kind of friendship... ...Rudra needed one think...Laila provided it...
Rudra lives in certain area of India were any girl will not say yes to the type of relationship they had shared...their they are either prostitute or NOT! there are no middle ground from where Rudra and Laila are coming...there's no friends with benefit thing exist there...
But Rudra needed that...and Laila provided it...at that time his need was much greater than dwelling over what kind of person Laila is...is she good or bad.???...all he cared about was his need and nothing else...
He was with her till he wanted it...and now when Paro entered his life he no longer needs her...
And there is no question why did he live with her if Laila was this bad...because all mattered to him was, he is getting a woman who is giving him what he wants without any strings attached,... Just what he wants