She welcomed her first child with fiance Artem Chigvinstev exactly a month ago.And Nikki Bella celebrated her son Matteo's milestone by sharing an adorable wide-eyed snap of the newborn with her 9.5m Instagram followers.'Our Matteo is a month old today,' she captioned the photo, tagging Artem, on Monday. Growing:Nikki Bella celebrated her son Matteo's one-month milestone by sharing an adorable wide-eyed snap of the newborn with her 9.5m Instagram followers, on MondayIn the snap, Matteo looks at the camera with dark blue wide open eyes, and his tongue slightly sticking out of his lips.He seems to have just finished a bath as as his hair was slicked up wet.