Katrina Kaif rejects Ranbir for Hrithik

It was reported that Ajab Prem Ki Ghazab Kahani pair Katrina Kaif and Ranbir Kapoor would act together again in a film by Imtiaz Ali. But the latest we hear is that Katrina has opted out of the film in order to act with Hrithik Roshan.
It's said that Katrina got the role in Imtiaz's new film because of Ranbir but she dumped it after getting a plumber role. She just could not refuse when Luck By Chance director Zoya Akhtar came up with a role opposite Hrithik. But is Katrina staking her friendship with Ranbir by rejecting his film?