Rashmika Mandanna's younger sister, Shiman, recently turned 13. (Credit: Instagram/@rashmika_mandanna) Renowned actor Rashmika Mandanna recently celebrated the 13th birthday of her little sister, Shiman, showering her with love and affection, as always. On the occasion, the Thamma star took to social media to share an endearing post wishing little Shiman well. “Happiest 13 to you my sweets! 13 is fun so make sure you have fun while you are at it! I love you, sweetie!! Biigggggesssstttt swiiisssshhhhy hugs,” Rashmika wrote, sharing two photos of her sister. While the first picture featured Shiman wearing a white dress with pearl detailing, standing in front of a blue heart-shaped cake, the second showed a close-up of her face, with cake icing smeared across it. Shiman’s 13th birthday comes barely a month after Rashmika turned 30. The actor has often spoken about her enduring affection for her little sister and how the latter stirs a motherly feeling in her.…