Illegal second marriage, son's share in property.

I got married in 1997, had a son in 1998. My husband took ex party divorce in 1999. I came to know in 2011, the orders were set aside, he remarried in 2011. He has 2 kids. He is staying with his second wife, we got separated after 4 months. He tricked me, now i being his legal wife, can i stay with him? when i go to his house no one answers the door;his father died. Can my son claim for his right in property. He keeps on making baseless allegations can i sue him in the court? our families have been in touch regarding this issue. My son is mentally depressed , the day his father ignored him. what should i do?