IANAL, but my best guess is that she was just let go without cause. Your employer can fire you at any time and technically doesn't need a reason. Typically, "terminated with cause" is a specific thing where they fire you and give a specific reason (e.g. stealing) that might have bearing on whether you receive unemployment benefits, accrued vacation, etc. It's hard to imagine that they fired her in that way and that she was just plain-old-fired (there's a reason for it, but not legal cause).