The Kapoors are a busy lot and not everyone in the family can make it to their weekly get-togethers at Krishna Raj Kapoor's house. But, as Ranbir Kapoor says, they are always in touch with each other via a WhatsApp group comprising only family members.But according to reports, Ranbir Kapoor's sister Riddhima Kapoor gets irritated by this habbit of Ranbir !