After leaving the Blue Parrot, Rick runs into Ilsa in the market.
Rick implores her to tell him her story now that he's sober, but she says she'd rather leave it alone, so that maybe they can remember the better days instead of their recent, nastier encounter.
But then she lays a bombshell on him. Victor Laszlo isn't just her latest fling—he's her husband, and was her husband even when she met Rick years ago. Rick may be headed back to the bar right about now.