My husband is torturing me lot mentally by suspecting me with lot of guys

I got married in 2014, soon after my graduation. My husband met me through matrimony and approached my family and me saying “ I want to marry your daughter, I like her so much, I will take care of her well, and I will do anything for her.” Somehow we got married but my Dad was against this marriage. And we have a kid now. But after few days of marriage, started to give me lot of mental torture either because of in-law complains or by suspecting. As my son was pre-term Baby, he got lot of health issues. So his torcher was difficult to handle. Because of his suspecting character, I stopped talking to my friends and even to my closed family members. I decided to tolerate him for my son’s future. But he started to suspect my son too, asked for DNA. It was too much to handle. And I said to apply for divorce after DNA, but he said sorry and will not repeat again. I and my son moved to Singapore as he was working their. My son had a good education and good lifestyle their. But last year, 2 times he took my son outside to shop started to do DNA test without my knowledge. It was completely online process. Apart from this he started to suspect me lot with unknown strangers. This year he threatened me. If I don’t let him to do DNA test, he will divorce me and kick me out of the house. As I don’t have job and my parents are old, he thought he can do anything. He promised after this DNA test he will never suspect and keep me very happy. He started to force me. I felt so broken by my husband while doing that test. He sent me and my son to India. I thought at-least after this result, he will feel sorry. But he instead canceled our return ticket. And asking to give my son to him. Without my knowledge he kept voice recorder in all room in Singapore. As our place is a very closed area , broad windows and parks are close to building, so many noises sounds comes from their. He started to make his own story using that voice recorder. He even installed a spy software in my son’s laptop to monitor me. And it has recorded my family conversation, my brother’s family, guest, and even serial dialogues so he is making a story that “I am already married and my family has cheated me, I am having lot of affairs.” And now he has come up with lot of new characters in my life which I and my family don’t know. He is saying that I have so many affairs in Singapore and in India. He is not only humiliating me, he is speaking very badly to my parents and brother. Because of him they are stressed out badly. Now he is asking me to accept my mistakes or else he will give me divorce as he wants to get married to someone else. He has humiliated me very badly for something which I never did. I don’t know what to do? He is earning well. But he stopped supporting financially to my son too. His educatIon, hospital and other expense. He gave me and my son pain. He ruined our life. He didn’t do any savings for us and now we are left with nothing. But he is enjoying their.