ST. LOUIS (AP) – The source of a $100,000 payment that went toward legal fees of the ex-husband of the woman involved in a 2015 affair with Missouri Gov. Eric Greitens will be the subject of a deposition next week.

Attorney Al Watkins represents the ex-husband and has said his firm received two anonymous $50,000 payments in January, just before Greitens admitted to the affair. But Watkins’ attorney, Chuck Hatfield, said in a hearing Friday that an unnamed client of Watkins was involved in providing the money.

Defense attorneys have speculated that the money could be from a “political operative.” Judge Rex Burlison ruled that Watkins must appear at a deposition Monday.

Greitens is charged with invasion of privacy related to the affair. A separate felony case accuses him of misusing a charity donor list.