Won't be surprised if they are doing an advertisement or a movie together. They want the world to see this so they called paps in Mumbai, Delhi and now again in Mumbai.
Everything looks staged by PR, the timing of arrival in the airport etc.
Ofcourse its planned, them getting papped going to Delhi, landing in delhi and coming back to Mumbai is not a coincidence. Even rk waited for dp at delhi airport so that they can be papped walking out together, they had separate cars and were going to different places, so he could left on his own, but he waited.
They know the reaction and hype when they are spotted together. Just look at the social media handles posting several videos and captions
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