In my opinion, whatever happened to Maya in the past does not matter anymore after she has taken a life of an innocent. No matter MJ killed her child, snatched everything from her or whatsoever, she killed Rishi and has lost all the sympathies she had. There were numerous ways to hurt MJ, ways which did not include killing an innocent boy. This act has overtaken everything wrong happened to her and she is the culprit now.
PS: I'm so sad Rajat's role is over so soon.