Can someone explain this legal summons to me?

Background: My daughter, we’ll call her Corrie, had a baby by a guy, who we’ll call Steve Jones. My daughter and Steve got along fine in terms of their son, whom we will call Aden, until Steve married the Woman From Hell. Since they got married, the WFH has made it her mission to make Corrie miserable. The only way she can do this, of course, is through Aden via Steve. They started child support proceedings about two years ago, although Corrie has Aden 48% of the time. Steve makes about $20 and hour, the WFH works if she wants, doesn’t if she doesn’t want to. Corrie makes between $8.00 and $10.00 an hour…..between bouts of unemployment. Corrie has been helpless to fight their never ending onslaught of motions and hearings and court orders regarding visitation, child support, anything you can imagine.

Well, Corrie finally got the money to get some good legal representation. She asked for one extra day with her son,among other small things, Steve said said “No” (if it was just him he would have had no problem with the requests, but he didn’t want to go home to the WFH and face her if he’d compromised) so Corrie’s attorney set a court date for August 26th, at 2:00, so the judge could decide all of this.

WELL, today (Saturday, so she can’t call her attorney) Corrie was served with papers that commanded her to be in court on the August 26th at 1:30 (which is on the same day as the original hearing called by Corrie’s attorney, but 30 minutes earlier) as a witness for Steve Jones. Say what? To make things even more confusing, they were demanding that she bring her income tax filings for the last three years. She also got a $10 check written on Steve’s attorney’s office because she was called as a witness. I don’t know what that was all about either, but I guess that’s quid pro quo in Kansas if you’re called as a witness.

Can anyone tell me what’s up? What are they scheming?