Ranbir-Katrina going through rocky phase?

Zee Media Bureau/Harpreet Kaur

New Delhi: Ranbir Kapoor and Katrina Kaif`s alleged relationship has been the talk of the town, ever since Kareena Kapoor addressed Kaif as her `sister in law` in a chat show. The star couple, who reportedly went on a vacation together to celebrate the New Year, are said to be at loggerheads with each other. According to a tabloid, it was during the duo`s recent New York vacation when something went wrong between them. It is also said that Kaif is apparently insecure and wants a commitment from her alleged beau Ranbir. On the other hand, there are rumours doing the round that Kaif wants to concentrate on her career for now. Kaif, who will share the screen space with Ranbir in their upcoming movie `Jagga Jasoos`, has reportedly begun shooting for the same. With rumours of a tiff between them, it will be interesting to see how they cope up with their professional commitments.