Why is Priyanka Chopra kept her lips locked ?

Vishal Bahradwaj who is casting for 'Kaminey' wanted Priyanka Chopra to play the part of sweety so badly, that he flew all the way to Miami only to give her the narration. PC was blown away by the script and when she started shooting for the film, Shahid Kapoor just swept her feet. But PC refuses. When asked her about her guy- Hurman Baweja she remains sshhhhh........about Shahid now.
This shows there is definitely something fishy.