My dad send notice to my mom saying she is not ready to come his home after long 10years.

Hi all My mom has received notice from my dad saying she is not willing to go with him after living separate since 10 long years as he was out of country for long 13years illegally . Let me tell you in brief My mom and dad are not having good relationship since day one and his father and his brother are so abusive since day one ,even they had fight the very next day when my mom dad got merried and than after they never stay to my grandfather’s house . My dad went out of country when I was 7 and came after 5 years by all these time my mom’s brother were looking after us ,infect he was the one who was looking after me and my sister and my mom as well ,my dad never given us single penny for study or anything .after few years he came back to India and stayed in India with us for three years during these time With my mom‘S support and with my mom’s brothers Support we bought house and he just gave a money to do legal things for house eventhow he was out of country for long 5 years .we stayed there for three or four years but he never was there for us fincially or physically,he was always thinking abt him self . After that he want to go abroad again ,for that my mom had to apply with him so he can get visa as my mom is government employee.they went their and my mom came back within the time as she has to join her job again and he stayed there for long 12 or 13 years between those years he hardly spoken to my mom or my sister and he never support us financially. Now that he came before one year and we are not keeping any relationship with him even we dint invite his whole family for my wedding even so he got post off . Now he is putting wrong allegations that we are giving him threat and my mom is not coming to his home and all eventhow he was the one who gave all the pain to my mom me and my sister .my mom work hard and paid all the money for my marriage and my sister marriage he dint support in any way on top je was telling to his family that don’t go and let her do it. But god’s grace I have very good uncle (my mom’s brother) Who’s more than dad to me so he helped through my whole life .whole my dad was in abroad he was sending money to his family and in notice he was mentioned that he wAs sending to my mom which was not true and we have house as well so he wants that as he doesn’t want to leave to his fathers house and his eyeing on my moms money as she is getting high paid due to government employees and he was send back by British government as he was illegally there . My questions is they lived separate more than 10 years so Is there any law In India that my mom get divorce on that base ,second we don’t want to connect with him in any way as he was never there for us and on top he is sending us notice with all false allegations Which all he did and he is putting on us .how we can tackle this situation and I have to go abroad as well in two months as my wife is US citizen so will this affect on me. My name is not in notice.