Why would Prena want to kill Mr. Bajaj????
well beacuse she finally came to know all truths about bajaj- he was the person responsible for Prem's kidnap-photograph blackmailing- drama of incometax raid and so on---ultimately getting prerna from anurag through wrong means -so bhagwan ke ghar der he- andher nahi- likewise ekta ke ghar der he andher nahi- it is victory of morale and truth over evils. it is victory of true love.