Peter Andre has shared a special message for Katie Price's son Harvey on his 18th birthday yesterday, 27 May.The 47 year old, whose glamour model ex recently revealed the reason behind their split, posted a string of red hearts beneath an Instagram post shared by his son, and Harvey's half-brother, Junior.Taking to his social media feed, the 14 year old posted photos of his eldest sibling and captioned it: "Happy birthday big bro. I love u so much you don’t understand.