Well said, Malini was never manipulated by anyone here. The change in her was all of sudden, when Omi attempted suicide and Adi found Omi's involvement in Navya's case.
But, whatever she has done since then with Adi and his love, is simply a crime. She just destroyed his life single-handedly, no involvement of Giriaj/any other. Even for Viond's case, she could not take a stand/believe that Giriraj must have done the crime. The same Malini used to give lectures to Giriraj earlier.
There cannot be any excuse to Malini. May be Kavya will forgive her in the end but dont think viewers will ever connect to her again.