Your claim on her MBA degree?

Under New York law, yes, you have a claim. Valuation is an issue as it is related to her earnings potential. That said, the ship has already sailed. You already finalized your divorce agreement with her.

2005年我被确诊为糖尿病，她是否应该付给我抚养费？--No.

In addition, who she slept with or is sleeping with now is her business and freedom. If you don't like her, divorce her, which is what you did. You did the right thing for yourself, but you must also respect her free will. You have absolutely no right on who she sleeps with. You had your right on a fair settlement for the divorce, but you let it go. You had your right to file for a divorce when 她会马上失去留在美国的合法身份，又没有工作, but you let that right go.

我工作特别忙，根本没心情理她，再说因为根本不爱她，话都不想和她说一句。That is not how a man treats her wife. 我从来没爱过这个疯女人，她和我结婚是为了来美国。Then what about you? Why did you marry her? Solely for sexual satisfaction? If that is the case, you are worse a human being than your ex-wife.

Bottom line:

1. You let go of your right on her MBA degree. the ship has sailed.

2. You can sue her for the $100,000 but I am not sure you can win given the circumstances.

As for the $100,000, it is your words against her words. I think your words are more credible and there is a chance you may win if you sue her. But there is also a chance you may lose. Other than adultry, a jury will like her more than they like you because the way you treated her "