Well it would be for obvious reasons that RK wanted to avoid the awkward situation of facing his 'Ex' and 'Present' girlfriend together on the set! However it seems Kat would not be following RK's guidelines and will accompany him for the second schedule of Tamasha, which is set to hit the floor in September.
According the the grapevine Kat has taken up this decision because of Ranveer Singh!
A source close to the stars had recently stated, it was Ranveer Singh's frequent appearances on the sets of 'Tamasha' that lead Katrina to take up this decision! Post wrapping up 'Bang Bang', now the actress is waiting for her next film 'Fitoor' to hit the floor, but apparently that doesn't seem to be happening anytime soon as the film is yet again delayed, so Kat decided to travel with RK and spend time with him, instead of staying back in Mumbai.
