who murdered shivani's husband in ithihaas?

Hi friends
Have downloaded 87 episodes of this wonderful soap. It was aired long time back so i dont remember it all. Dpecially the climax about murder. Who murdered shivani/ambika's husband? Was it kaushalya? She stole padmini and looked aftrr her. I remmber 90% of d story but missed this crucial thing
Cud u plz help if u hav seen it. As only 87 episoded r thrre on utube.
Thank you so much.
Just got to read detailed synopsis...it was kaushlaya...and sad the show went off air without punishing her.

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