I’m guessing it was trying to distinguish between him and her previous business partners?
I see the same thing happening in Spanish - no one can say “novio/a” anymore. Why?
In light of all these facts, I, for one, would say that "partner" is an impoverished term to use in this headline, because what really does that signify? A business partner? Come on. There are obstacles here to clarity of terminology, due to the dubious nature of her legal marriage and such. But this is a woman who seems to have leveraged her sexuality to every advantage, as well as being taken advantage of in return. Not a good scene!