My father left us (me, mom and sister) before 2001. My parents didnt take any divorce. My father happily married to another woman and they have one girl and one son born on 2004 and 2006 respectively, and i have proofs of their aadhar cards. after 2001, he didnt spent even a single penny on our education or expenses, all the expenses are taken care by my mother's family. im a graduate and preparing for jobs, and my sister present working in bank. my sister is unmarried and may be this year or next year she will get married. after 16 years, last week my father sent court summons to me and my sister for maintainance. Actually i never saw my father in last 16 years and he didnt spent anything from my 5th standard. and now he filed case against us. i dont want to pay him anything. please give suggestions