In Connecticut, the judge can inquire as to the reasons for the sudden unemployment and set child support accordingly. You need to inquire not only into the reasons why she left her job but also into the efforts she has made to look for work. What headhunter firms has she registered with, when did she last update her resume (be a real prick, subpoena her computer), what firms has she applied to, what jobs have opened up that she DIDN’T apply to? If she quit her job to avoid paying child support, she could be in a world of hurt in front of some judges.
As for the defamation issue, the question is whether you can find an attorney to take the case AND whether she has any assets against which you can levy a judgment. Its nice to get a jury award, its even better for the defendant to actually have money.