And on Tuesday, Jasmine, 36, was spotted doing some Christmas shopping with a friend in the coastal town of Sunshine Beach, just east of Noosa Heads.
The shoe designer wore stylish activewear as she doted on her seven-month-old daughter while on holiday.
The former model wore a loose black T-shirt with leggings and white sneakers.
Jasmine completed her relaxed look by pulling her long blonde hair into a high bun, and accessorised with a pair of designer sunglasses and a grey bag from Willow Bay.
She pushed little Harper through a car park in her stroller, then carried the baby into her four-wheel drive, placing her securely in a child's seat.
The Stefanovics, who married in December 2018 in San José del Cabo, Mexico, welcomed Harper in May this year.
'I am in awe. Harper is absolutely perfect,' Karl, 46, said in a statement at the time.
According to Woman's Day, Jasmine is keen to have another child with Karl, who also has three older children from his first marriage to Cassandra Thorburn.
An insider told the magazine that Jasmine has been 'desperate to get pregnant again' ever since welcoming Harper.
They added: 'She's always wanted to have a brood and to give little Harper a playmate, and she wanted to do it as quickly as she could.'
Karl is said to want a girl, while Jasmine is eager to have a boy to 'balance out' the household.
In a telling clue they're planning to grow their family, Jasmine has reportedly already submitted council paperwork to build an extension to their holiday home in Noosa.
A similar report in New Idea also outlined the couple's baby plans, with a source saying Karl was actually hoping for a boy.
'Karl would love nothing more than a brother for little Harper,' an insider said. 'He openly jokes with friends and colleagues, "Next one, next year is a boy."'