My take: Anamika could've been shown as the victim of a conspiracy. E.g., her having an enmity with someone, and that person getting murdered brutally, causing all suspicion to fall on Anamika. With all proof against her, she was executed, leaving her soul vengeful. Then Jeet/Rano could've uncovered the mystery of the real murderer, who could've turned out to be somebody from the family.
What say? Do relate your own ideas.