does ex wife have to know about my husband and i filing for 7

[helpmeout]

Is there anything she can do with the information? My fear is that she will now try to get more support now that we may get cleared a bit with this filing and we just recently had 2 kids 2009 and 2010.

The only thing she can do with the information is file for a child support modification if his income went up since it was first calculated. And she will have access to that information via public records. If it hasn't changed, then there really isn't that much she can do.