Osher continued: "I don't know how long he'll let me do it - but holy moly I feel the gears shifting between my ears when we cuddle like this.
"I can't nurse him like @audreygriffen can - yet when he's grisly but then settles when he's on me?
"I'll take that feeling for as long as I can get it. "
On Monday, Osher introducd his baby boy to the world by positng a sweet black and white photo of himself hugging Audrey and the new bub, announcing that he had named his son Wolfgang (or Wolfie for short).
"Please meet Georgia’s youngest brother, Wolfgang. We call him Wolfie for short," Osher began.
"He and @Audreygriffen did so well on Friday when he was born perfectly formed with ten fingers and toes, healthy and happy at 3.97kg. (Though between the delivery bed and the scale he did do a massive poop - and the doc agreed that if he hadn’t he would have topped 4kg easily.)"
Osher continued his lengthy Instagram post by praising his wife: "I am in complete awe of my wife.
"What I witnessed her do, the power I saw her summon from within her to bring this boy into the world was utterly astonishing."
Osher also shared how Audrey's daughter a previous marriage, George, was in the room with her mum and stepdad.
"Wolfie’s big sister Georgia was in the room with us via the most perfect playlist that she made especially for the occasion - and this boy came into the world to the sounds of Kendrick Lamar, Beyonce and Khalid."
Osher married Audrey - a freelance makeup artist - in 2016 in a stunning ceremony in the Hunter Valley.