But Kim Kardashian spent her Sunday doting on youngest one Psalm, who is just three-months-old. While sharing a darling mother-son snapshot to her social media, the reality beauty called her little one 'the best baby' and the 'sweetest ever.' ​ Pride and joy: Kim Kardashian doted on her three-month-old son Psalm on Instagram Sunday, calling her little one 'the sweetest ever' and 'the best baby ' 'My little man is ...