What can I do against blackmailing and trespassing?

In early 2022 she left with my younger daughter aged 4 yrs. for inviting my parents for a ritual. I'm with my elder daughter aged 11 years since then. She spoiled my sister's matrimonial life by provoking conversations with her family who are already cruel. My sister escaped near death along with her 3 kids, filed 498A and fighting legal battle. I was able to gather a few audio clips that support these arguments. I invested in real estate for my daughters future, also in farm land (cash transaction) which i bought on my wife's name. She is demanding 50% of the acquired properties for separation / divorce alimony. I clicked a few photos with the bodily injuries of my younger daughter when i saw her near the counselling center, she joined her in autism school claiming she is a weak kid. A year ago, she trespassed into my residence and created a nuisance with a person who claimed himself as police, and I have fortunately captured the video of the scene.