Madeline Holtznagel shows off her growing baby bump while returning to Justin Hemmes' $100million Vaucluse mansion by seaplane - as she breaks her silence on her pregnancy

Madeline Holtznagel is positively glowing as she prepares to welcome her first child with billionaire pub baron Justin Hemmes.

The model mum-to-be, 28, was spotted on Sunday arriving back at the couple’s sprawling $100million Vaucluse mansion after a scenic seaplane flight on Sunday after hosting a lavish baby shower for Sydney’s elite.

Dressed comfortably yet stylishly for the occasion, Madeline showcased her blossoming bump in a knitted brown co-ord set consisting of a loose-fitting, split-side top and matching shorts.

She completed her relaxed, chic look with chunky white slides, a small black designer handbag slung over one shoulder and oversized sunglasses shielding her makeup-free complexion.

Her blonde locks were slicked back into a neat up-do secured with a claw clip, and she kept her accessories minimal, opting for simple gold hoops.

The model looked relaxed and radiant as she carefully disembarked from the seaplane, with a smiling helper offering a hand as she navigated the shallow water and sandy shoreline.

Madeline Holtznagel (pictured) is positively glowing as she prepares to welcome her first child with billionaire pub baron Justin Hemmes

Madeline cradled her bump protectively as she made her way up the stone path towards the couple’s historic estate, looking every inch the glowing expectant mother.

The model broke her silence on her pregnancy this weekend, as she showed off her baby bump in Stellar Magazine.

The mum-to-be said that she has kept the process to herself but was now ready to share her journey.

‘I keep a lot of my life private and I don’t share a lot online anyway, so [being pregnant] wasn’t really something that I was going to share online’ she said.

‘I haven’t posted about it and it’s been nice to have some quiet time off Instagram.

‘But obviously because I am in the public eye and we do get photographed quite a lot, I think now I’m at this point in my pregnancy where it’s nice for me to be able to share some nice photos’.

Madeline also revealed that she has sought advice from her older sisters Anna and fellow model Simone, who both have had children.

‘I call them and ask all those little questions that you have and they gave me a list of things to get and what things you don’t need’ she said.

Dressed comfortably yet stylishly for the occasion, Madeline showcased her blossoming bump in a knitted brown co-ord set consisting of a loose-fitting, split-side top and matching shorts

She completed her relaxed, chic look with chunky white slides, a small black designer handbag slung over one shoulder and oversized sunglasses shielding her makeup-free complexion

Her blonde locks were slicked back into a neat up-do secured with a claw clip, and she kept her accessories minimal, opting for simple gold hoops

‘Honestly, what do people do if you don’t have sisters or friends to ask? You grow up with your siblings your whole life and then you go into this whole new parent journey together, it’s beautiful’ she continued.

‘It’s been so nice having them to just call and ask and I know that the phone calls aren’t going to stop’.

On Saturday, Madeline pulled out all the stops to host a luxurious baby shower at the harbourside mansion, with a guest list boasting some of Sydney’s most recognisable socialites.

Among those in attendance were her sister Simone Holtznagel, ‘nude artist’ Dina Broadhurst and Merivale’s own Nasim Köerting.

The glamorous event featured sweeping views of Sydney Harbour, bespoke hors d’oeuvres including bumps of caviar, seared salmon and cream-filled donuts, and a stunning three-tier gourmet chocolate cake made by Merivale’s top chefs.

Inside the estate – originally built in 1831 and now worth a staggering $100million – guests marvelled at the luxurious interiors, including Carrara marble, copper fittings and European oak joinery.

Madeline, who has kept her pregnancy relatively low-key on social media, has reportedly been revelling in her final weeks before motherhood, with friends sharing glimpses of the baby shower celebrations online.

Delicious bespoke hors d’oeuvres were circulated around the shower, including bumps of caviar, seared salmon and cream filled donuts.

The model looked relaxed and radiant as she carefully disembarked from the seaplane, with a smiling helper offering a hand as she navigated the shallow water and sandy shoreline

Madeline cradled her bump protectively as she made her way up the stone path towards the couple’s historic estate, looking every inch the glowing expectant mother

The model broke her silence on her pregnancy this weekend, as she showed off her baby bump in Stellar Magazine (pictured). The mum-to-be said that she has kept the process to herself but was now ready to share her journey

At one point, Madeline could be seen grinning from ear-to-ear as she cut into a three-tier gourmet chocolate cake in her huge kitchen.

Simone, 31, put on a leggy display in a beige mini dress as she arrived at the home, hiding her eyes behind a pair of dark designer sunglasses at one point.

Meanwhile, Dina, 48, showed off her bust in a $560 baby blue mini dress from SIR.

Marcus Brodie, who is the Head of Guest Relations at Justin’s company Merivale, shared a collage of instant pictures he snapped of the occasion.

There appeared to be a theme of white dresses among some of the female guests, with Marcus also taking a picture of a toy car meant as a gift for Madeline’s newborn, who sister Simone has dubbed ‘Baby H’.

Model Julia Cavanagh also shared several images of the behind-the-scenes, revealing a table packed to bursting with gifts from loved ones, and a clothes line decoration with several baby clothes pegged to it.

Montana Cox, also a model, followed with her own photo of Madeline posing against the backdrop of the Sydney Harbour as she threw her head back while friends snapped pictures of her.

On Saturday, Madeline pulled out all the stops to host a luxurious baby shower at the harbourside mansion, with a guest list boasting some of Sydney’s most recognisable socialites

Madeline cradled her growing baby bump as she let her blonde tresses fall in loose waves and opted for a very minimal makeup look

Madeline could be seen snapping pictures of her catered spread

Montana Cox, also a model, followed with her own photo of Madeline posing against the backdrop of the Sydney Harbour as she threw her head back while friends snapped pictures of her

Delicious bespoke hors d’oeuvres were circulated around the shower, including bumps of caviar, seared salmon and cream filled donuts

Marcus Brodie, who is the Head of Guest Relations at Justin’s company Merivale, shared a collage of instant pictures he snapped of the occasion

Justin grew up in the gothic-style mansion, which is now worth an eye-watering $100million, and moved back into the property in 2011 to complete an extensive renovation on the heritage-listed home.

Inside, baby shower guests took in the Carrara marble, copper fittings, natural stone and European oak joinery of the luxury mansion, which is now set to become Justin and Madeline’s family home.

The soon-to-be trio will spend their days languishing in an outdoor angular swimming pool complete with pool-side bar and lounge area which make the most of spectacular harbour views.

In November an insider confirmed the exciting news of Madeline’s pregnancy to Daily Mail Australia and revealed a friend of Justin’s recently moved out of his Vaucluse mansion to make room for their growing family.

Justin, who has a net worth of $1.39billion, already has daughters Alexa and Saachi with his ex-girlfriend Kate Fowler, from whom he separated in 2018.

The business mogul then began dating Madeline the following year, when the model was 22 and he was 47.

Though they generally keep their romance under wraps, the couple are often seen disembarking from his sea plane after enjoying luxurious family holidays with his two daughters.

The delicious food was prepared by top chefs working for Justin at Merivale

Balloons decorated the property that overlooks the magnificent Sydney Harbour

At one point, Madeline could be seen grinning from ear-to-ear as she cut into a three-tier gourmet chocolate cake in her huge kitchen

The Design Director at Merivale, Nasim Köerting, shared a slew of images of Madeline posing with her friends, as well as a close up of the huge cake and delicious food, all made by Head Chef Tal Buchnik and Executive Chef Mike Eggert of Merivale

The couple have gone from strength-to-strength since going public and even sparked engagement rumours in June 2023.

Eagle-eyed fans noticed Madeline was wearing a ring on her wedding finger as they questioned whether Justin had popped the question.

A picture showed her sporting the jewellery as she cuddled up to Justin while enjoying a bowl of Udon noodles together at a restaurant in Japan.

But the bling appeared to be an emerald and diamond promise ring, and another photograph showed her wearing a different ring on the same finger as she posed for a selfie.

In August, Madeline also made a rare public post about Justin as she took to Instagram to mark his 52nd birthday.

She shared a series of romantic selfies of them both and gushed over her partner in the caption.

In one picture, Madeline flashed a huge smile as she sat on Justin’s lap while he lovingly gazed at her.

Justin is considered Australia’s hospitality king, with more than 80 venues and billions in assets with names like the Ivy, Queen Chow and Establishment under his purview as CEO of Merivale.

He is the only son of Merivale Group founder and nightclub mogul John Hemmes and Justin took over the business after his father’s death in 2015.

Madeline is the younger sister of fellow Aussie model Simone Holtznagel, who welcomed her first child, a daughter called Gia, in March last year, with her now-ex-boyfriend Jono Castano.