She is claiming she is getting stuff straight from Oscar, why would he tell anything to someone that spreads it all over Twitter? Just some woman that is obsessed with him from what I can see.
If he is not going to talk to someone because they will spread it all over the Internet, he wouldn't bother turning up for the press conferences, he'd never speak to fans, etc. the guy would stay silent.
Really, has he given her any propriety information? No, so I very much doubt him telling her this and her sharing it is a big deal, or even a small deal.