In Two Aces, Rebecca has a breakthrough thanks to Sam - she had been focusing on destroying the team that Rupert loved, but when Sam asked her to attend the de-cursing ritual, pointing out that it was her team, it got through. That's why she attended the ceremony in the first place.

But Higgins betrayed her; he went behind her back, concealed information from her, for the express purpose of acting against her, just as he had done when acting in service of Rupert's affairs.

It was upon learning of Higgins' betrayal that she went back to her office and finalized the return of Tartt to Man City, and Jamie was directly responsible for the outcome of the season's final game.

It certainly wasn't Higgins' intent, but unintended consequences are still consequences.