If you want a divorce, move out asap and withdraw your sponsor for her I485. Isolate yourself from her on every matter and start collecting all financial records. But I believe you still have the obligation to support her. Your advantage maybe that you are the main source of income and the disadvantage is that you have a lot to lose. The worst thing is to have further complication such as domestic violence etc. As for the money and properties, she is entitled her fair shares, don't know how much though. After all, she committed herself to you for sometime. But marriage is mutual and takes a lot of commitment, hard to believe she entered with a malicious intent. Something happened during that 1.5 years. So think carefully.