Sujata knows the truth and so she can take whatever Ramakant dishes out to her. Suman is kept in the dark by everyone and its a shock to a newly maried woman.
And that payal rubbed salt in the wound by snide remarks. Suman accidentally pushed her and its not a murder.
Suman's anger is justified and her turning into a bitter woman is understandable.
Suman should not have compromised but kicked Ramakant out of her life.
And why to bring a ghost in a rational story?