Actor-turned-author Twinkle Khanna shared a rare monochrome picture of her sister Rinke Khanna who turned a year older on Wednesday. Twinkle Khanna shared a rare picture of sister Rinke Khanna. In the picture, Rinke Khanna donned a baggy top with her daughter Naomika posing next to her in an off-shoulder dress. Tisca Chopra added, “Have a crackling good year darling …