Zoe first broke the news of her second pregnancy on social media in December last year, by uploading a photo of an ultrasound and writing: "It's really bloody hard for me to keep a secret. That's why I've hardly been on Instagram or sharing stories because I don't trust myself that it would just slip out."
She continued: "It's time. I've been incredibly sick and isolated for the last 11 weeks because of this little monkey."
Zoe also added that she was looking forward to sharing all the "good, bad and really ugly bits" of her pregnancy with fans.
In her post, Zoe also shared a snippet from her podcast, The Deep, where she spoke about how cautious she and Benji had been around the second pregnancy given the complications they've had in the past.
In the recording, she explained that Benji had a lot of anxiety around her announcing they were expecting too early in the pregnancy, after losing a baby in 2019.
"He's had a lot of anxiety around me sharing prematurely, which I completely understand," Zoe said.
"We had a loss around this time last year. I think the impact of that on me really rattled him. He's private in general but didn't want me to share," she said.
The pair also spoke to Woman's Day back in 2017 about their difficult road to parenthood, where Zoe explained she'd suffered severe stage-four endometriosis, and felt that that was the reason why she struggled to fall pregnant.
"We always knew we wanted a baby, so living with that uncertainty was tough. It was always in the back of my mind," she said.
Zoe eventually turned to Chinese medical practitioner Dr Shuquan Liu for help, and six months later, she received the exciting news that she was pregnant with her first child.
The pair also spoke with Woman's Day after the safe arrival of their firstborn to share the experience.
"The doctor said the cord was wrapped about the baby's neck, so I told Zoe she had to push. It was as if I was giving a talk to the boys on the field," Benji told the publication.
"Everyone in the room was making pushing noises to motivate her. Then the doctor said I'd have to grab the baby really tightly, because he'd feel like a wet footy. I squeezed him so hard, he was going nowhere!"