[wigsgiw]

As an employer, I'd consider it out of line to ask an employee to help in a crisis out of hours, unpaid. More so if they'd been effectively fired weeks before. As noted, the time to find other work isn't out of the goodness of her heart; it's the law in Belgium.

Employees giving their time for a panic, outside of their normal hours, is a privilege earned by employers through treating people right. Expecting those who've been shown the door to do so is twisted.