Mother’s sister commenting murder accusations on me and my wife on a post we posted from Mom’s FB account regarding her business

My mother passed away a month ago, she took her own life and wrote in her note that no one is responsible for her death. Police have the note in their possession. We posted a Holi sale message for my Moms boutique from her FB account to liquidate her stocks and my mom’s sister posted a very offensive comment stating that after “killing her we are now trying to usurp the business and run our home from it”. (She did not make even 5000 from the business and did it purely as a hobby. I make over 2L pm working a corporate job) Want to know if we can take any legal steps against her, I am ready to spend a fortune to see her getting punished. Please Dm me if you can, can pay for sound legal advice on the matter.

Thanks