Following days of speculation, Kourtney Kardashian has appeared to confirm the arrival of her baby son with husband Travis Barker in a new social media post.The Keeping Up With The Kardashians star, 44, took to Instagram on Tuesday to wish Blink-182 drummer Travis, 48, a happy birthday along with a series of intimate photos of them together. "To my husband, my soulmate, my best friend, my lover, my daddy to our baby boy, my everything… I wish you the happiest birthday.