Another twist in the growing scandal engulfing Rep. Tim Mahoney:

An unamed source told The Palm Beach Post Tuesday night that the FBI will investigate embattled Rep. Tim Mahoney to see if the lawmaker used campaign funds to pay off a mistress.

“FBI agents Tuesday reached out to several major players in the sex scandal that has ensnared Democratic U.S. Rep. Tim Mahoney,” the paper reported.

The source told the paper that late Tuesday that the head of the anti-corruption unit of the FBI’s West Palm Beach branch spoke with the lawyer of Mahoney’s alleged ex-mistress, Patricia Allen.