The news is doing the rounds that Priyanka had a major fall out with Mubina for leaking their confidential talks to Shahid. She confronted Mubina the first time it happened but she denied leaking out any information. But she decided to severe ties with her after she repeated the same mistake.
It's said that Shahid was not comfortable with Priyanka's friendship with Mubina when they were having affair, as he thought she would conspire against him. They even fought over it but Priyanka continued her friendship and even shared her secrets with her. Interestingly, Shahid was linked to Mubina in the past.