Well, some things just aren't meant to last.
Per the report, the couple have been "separated for a while" but claim no other parties are responsible for the split — AKA no one cheated.
Unfortunately, it appears Bourdain's hectic filming schedule is to blame for the breakup. It's a pretty sad reason considering that's why his first marriage of two decades ended in 2005.
As for Busia, she also confirmed distance was a major factor in their separation: