Its just a conjecture.
Till now we know that Kartik holds Mansih and Suwarna responsible for his mom's Suicide (If it was a suicide at all)
Somewhere I feel the situation may have different layers to it ie-
Actually Manish and Priyanka were good friends and someone in the family manipulated Kartik's mom that Jija saali are cheating on her and she started getting annoyed and jealous. And later Kartik was misinformed that his mom could not bear the presence of Swarna in Manish's life while in reality it was Priyanka she was jealous of (this too was a misunderstanding)
Scenario Second, this one is too dramatic to be true. His mom had an affair with someone and to hide it or (someone ws blackmailing her ) mANISH TOOK the BLAME OF EXTRA MARITAL AFFAIR ON HIMSELF SO THAT kARTIK DOES NOT HATE HIS MOTHER.
Scenario three, Kartik and Suwarna were lovers before marriage, but Dadi forced him to marry Kartik's mom. Manish was loyal to his wife but when Suwarna joined his office his wife started doubting Manish unnecessarily and this created annoyance between husband and wife. Kartik's mom did not want to commit suicide, may be she just wanted to scare Manish but by mistake she ended up killing herself.
Am sure in the end it wud be no one killed Kartik's mom. It was just a mistake of herself to misunderstand (if no one manipulate dher to doubt ) and then get killed by destiny. Like no one killed Akshra, coz I feel Akshra herself got killed to save Mansi or Kartik or both of them.
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