Turns out home-wrecker Leoni has reportedly been sleeping around - with Billy Bob Thorton.
Talk about a downgrade!
Duchovny and Leoni have confirmed that they have been separated for several months now.
A source close to the couple, though, says they still appear "close and friendly."
After everything they've been through!
He's probably so cool with the affair cuz he's probably done it too - over and over again
[Image via WENN.]