Alongside a snap with their pet dog, Piotrowski appears to be holding a baby onesie branded with an NBA team logo.
"Not sure of the gender... but the NBA team is not negotiable. Baby O'K coming July '18," the journalist captioned the cute picture.
Piotrowski and her Publican husband married just more than six months ago in a lavish New York City garden wedding.
Piotrowski has been working on the Channel 9 network for eight years.
All the best to the happy couple!