Can Husband Claim Wife Property And Pension In Pending Divorce Case

My mother died of cancer 3 months ago she did a registered will in a favour of her sons. She was in a divorce case with her husband for 9 years. The case was still pending. She was a government employee. Here are some questions: 1. Can her husband (my father) claim pension, job, gpf, insurance. (She leaves Registered Will in favor of her sons). 2. Do Her husband has the right to challenge her will. 3. My mother also nominated her son's in her service book. 4. My father threat me that I can make a fake will with the fake signs of my mother. Is it possible? 5. Do 9 years divorce case has powerful ground. My father Molested me, my brother and my mother for whole life!! Please help I'm very scared!! Please help!! I'm only 19 years old!!