^That depends entirely on what kind of deal the model's agents had with "Versace." But since you said there was no contract, then there would be no legal basis for the original agency to collect revenue from the model's continued work with that client. "Relationships" are not a binding contract or a legal term. Just because one agency got a client to use a particular girl once or twice, that not enough to ensure them revenue from her continued work wth that client after she leaves the original agency.