NEWS Rob Kardashian’s emotional message to his future step son, King Share Tweet Share Share Email Comments Rob Kardashian shared this emotional message to celebrate his future step son’s birthday. His fuance, Blac Chyna’s son King Cairo turned 4 years old Sunday. Read what he wrote after the cut…. Related Items: Share Tweet Share Share Email Click to comment Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Δ