I read an interesting post on twitter today. Forgot who wrote it, and can't seem to find it when I go back hunting for it. But in a nutshell it said: Malini's problem was never the fact that Aditya fell in love with another woman, it was the fact that the woman Aditya fell in love with was Imlie. Why? Because in some twisted sense it made her like her mother Anu, and Imlie like Meethi.
I remember seeing a clip, of a pre Aryan episode. Here Malini asked Aditya for a promise. That no matter what, they will never let their marriage become one like her parents' (Dev and Anu's). Malini grew up in that dysfunctional and broken family. Her biggest fear was loveless, meaningless marriage like her parent's.
And yet, when it was revealed that she was cheated on. She was obviously shattered, devastated and torn. But she got over it. She braved through and even tried to help Adi_lie. What changed (other than the CV's mind) was Anu's taunts and ramblings hitting the nerve. Anu painted the image in Malini's mind that she is now Anu 2.0 and her half sister. Her father's other daughter is Meethi 2.0.
Just like Meethi robbed Anu of a happy marriage. It is Imlie who robbed Malini of a happy marriage. And Malini started believing that. So, it was less about getting Adi and Adi's love - but more about causing Imlie pain and misery for ruining her life.
That is why it makes complete sense for her to want revenge and continue coming after Imlie.
Thoughts?