First wife & children claim share in husband's property after divorce

I belong to a Muslim family after marriage. My husband gave divorce to the first wife, she got married and has a kid apart from 2 kids from my husband. And my husband and myself has a kid too. In the initial stage of our marriage my step kids were good but gradually their mother filled their ears and got against me. They use stay with us. Then she sent us a lawyer letter asking for money without specifying till what time period and etc. And now she is sending kids to my place suddenly and disturbing my personal life. These kids along with their mother plotted lot of things against me already. Now I want to ask apart from monthly money will she ask for property share for her kids? The property is in my and my husband's name, where we are staying. I really want to get rid of them.