Inlaws creating problem

Dear Lawyers. My sister-in-law's family creating problem in my family. They want my mom to transfer one house on my sister-in-law's name. When my mom refused to do so her family started creating troubles. He comes to my house with 10 people and creates drama. Her father abuse my mom and my sister. Her father is telling dat transfer one property on his daughter name or else he will file a false case. My mom is a senior citizen with partial blindness. I wanted to ask what shall my family or my brother do to get rid of this? Regards.