Yes nishu di where did this question of choice comes from.atuls case I feel he had always feelings for Madhuri right from apan s marriage but due to circumstances he was forced to marry Anu ,their drivers uneducated sister( not an offense but atuls pow he tho AS ki beta na) and he was never ok with it and when he came to knew that madu is Prego with is child he used that situation to move away from this forced thing. I even doubt wether Atul Anu shared any serious hus wife relationship though Anu was serious about her marriage.
And kalma I'd different we all know that kallu is his jaan.Remember KBM and his struggles.i don't think he will even think of kethki in galat sense.he may temporarily trust her over kallu in atuls case as it is obvious that kallu will take her dad's side and mallu can be pised off about it. but mallu having place fir kethki in heart is impossible. ha but ketki may try to show it off like that to kallu and this may heart her and even make her realize things.but that will make kallu more possessive and doubtful about ketkis intentions
this is not a parellell situation cvs are trying to show like that.vo hame gumrah kar rahi he