You can make an allegation about anything you want on the face of the earth but without proof that is not journalism.
However, to be specific, the thought that Miuccia Prada gave Sasha the Prada campaign for 8 seasons because she was manipulated into doing so via a bribe is to suggest the woman was clueless or played no part in choosing the face of her house. Which is incredibly ludicrous. That part of the allegation HAD to be made by a really bitter and malicious rival agent with an agenda.