Gracie79

I have been married for more than 5 years with a US permanent resident. Because of the long waiting period of family based immigration visa, our son and I reached the US in Oct, 2009 granted unconditional permanent residence. Before that, I spent 3 years studying in Canada and taking care of our son alone. My husband really took little care of us. He only went to see us twice a year, 10 days each time during my stay in Canada. When we just got married in May 2004, he treated me well. My life ruined since his boss sent him back to China, his home town to open a company for software outsourcing. He spent more than half a year annually in China. So he began to have an affair with some Chinese young girls. I don’t have evidence about that and don’t have time to gather evidence as I am busy with my study and taking care of our 2 years old son. He just told me that he was playing with them. When I reached the US, I found a lot of evidence. I found unusual close photos(kissing photos) he took with some Chinese young girls. I also found a young girl’s photo in his wallet, cell phone… He likes her very much, and there is other evidence he wants to marry her. He refused to open a mutual account with me and I cannot touch any of his money. He kept me staying at home taking care of the son, doing housework. He had a very high salary but he refused to share, so I had to live on my small savings gathered before I had my Master’s study. Even in Canada, he supported us very little. Even though we have been married for as long as 5 years, I just arrived here several months ago. Can I sue divorce now? Or I need to bear for a longer time. To be honest, during so many years’ mental abuse and economic abuse, I am accustomed to his cruelty. He admonished me last month, if I propose to divorce in future, he will try his best to revenge. I think what he meant is to go to USCIS to revoke my permanent residence. Or I cannot think out other ways he can revenge. I think he also wants to divorce, bigamy is not comfortable for them. And the young girl (19 years younger than him) he loves doesn’t know he has wife and son in the US. He cheated her to be single just like he cheated me to be single 5 years ago. Not until recently, I knew that he had a short marriage in the US before ours. He doesn’t want to sue divorce here, because the US divorce law protects the woman and child more. He wants to sue in China, there, the unscrupulous court will give him everything (divorce judgement, the child custody, the property, no spousal support) without my showing up. Both of us love our son actually. Whether he has already sued or not in China, I am not sure. Now I just want to ask for your advice after you see my story:
1) Can he revenge if I sue divorce now? Whether my unconditional permanent residence will be affected if he goes to USCIS? I don’t think he is the first one wants to do so, how USCIS deals with these affairs? I just want to know about it and I can prepare myself for that.
2) If he has already sued in China, can I sue again for divorce here? I know these two countries don’t recognize the law each other.