Ilya the prostitute, the one who never worked on Sunday, had her own way of doing things.
And her own way of doing things was putting wild ideas in the heads of her fellow workers, making them think they might do things their own way too. It threatened to upset the whole economy in a Greek port town, just about the time a ship full of sailors was due to dock.
She was a free-thinking, independent girl who just wasn’t going to follow the rules.
This would mess up business.