According to article I read they had an open relationship, but giving mouth to service to that idea and actually living it are two different things.
Bourdain & Argento or Bourdain & Busia?
I know Bourdain & Busia didn't live together for quite a bit of their marriage - whenever he talked about it, it seemed pretty open. Current reports from some of his friends/co-workers have been stressing how "crazy" in love with Argento he was and how oddly he'd been acting.
Guess in the long run it doesn't matter and I'm not AT ALL assigning blame to anyone. Just super fucking sad.