How to protect ourselves from brother's divorce living separately

I am a hindu 37yr old lady staying with my mother who had been a cancer patient in past. We are staying separately from my brother and his family from past 8 yrs. He lives on my mother's property on 3rd floor as tenant and we live on ground floor. We have no say in each others matters. Of lately my brother is planning to divorce his wife. In this case scenario what should me and my mother do to prevent ourselves from any problem?