According to reports from an entertainment website, the genesis of these rumours can be traced back to an intimate gathering hosted by director Imtiaz Ali, where Ranbir, Katrina, and Alia were in attendance. Sources suggest that Ranbir’s apparent affinity for Alia during the event stirred discomfort in Katrina, leaving her feeling vulnerable.Katrina allegedly confronted Ranbir about the matter, seeking reassurance, but her concerns were reportedly brushed aside Entertainment News, Celebrity News, Latest Movie News, Breaking News | Entertainment – Times of India 

 – Source Times of India