Earlier this week, a local publication claimed that the 36-year-old author and her radio host hubby were trying for a second baby and crossing their fingers it would be a baby girl.
However, the mum-of-one has since confirmed that two-year-old Sonny is set to remain an only child for the foreseeable future.
Instagram user Flicky23 shared her joy for the future Foster-Blake baby and commented under one of Zoeโs photos to say congratulations.
โCanโt wait to see Sonnyโs new sibling @zotheysay Iโm so excited,โ she penned.
Quick to respond, Zoe quipped, โDonโt believe a word! Complete stinking horseโ- as usual.โ

The Wrong Girl author has spoken out about her desire to have more kids down the track, despite having a difficult first pregnancy, where she faced serious health issues including severe morning sickness, gestational diabetes and Ostetis Pubis.
But for now, Zoe is enjoying being a mum to Sonny as she balances her incredible career.
2016 has proven to be one of her best years yet with her beauty empire, Go-To, and her updated beauty bible Amazinger Face, reaching dizzying height of success.
On top of that, the TV adaptation of her hugely popular book The Wrong Girl is set to hit Channel Ten later this month.

Zoe during her pregnancy to Sonny.

Zoe and Hamish tied the knot in 2012.
โMy new thing is to only do one thing well. I hate seeing myself stand [at the shops] and try and answer emails because Iโm not doing either thing well,โ the star recently explained to Mamamia about how she manages her work-load.
โIf you canโt do two things well at the same time, just choose one. And be true to that thing in that one little minute.โ
And sheโs not done taking over the world just yet.
โI like fiction, I like creating, I like newness so Iโm always sort of looking around and I get so pumped. I honestly have about three business ideas a day that I want to do,โ she explained during her chat on Mamamiaโs I Donโt Know How She Does It podcast.
As for her next book she says she has some ideas up her sleeve but it โmay not be what you expect from me.โ
Watch Sonnyโs sweetest moments in the video player below! Article continuesโฆ

What a sweetie!
The couple adore being parents to two-year-old Sonny.
Hamish gushed about his little boy to TV Week, saying, โI canโt believe how lucky we are to live with him. At least until heโs 17 and gets sick of us squishing him and runs away!โ
The radio host also spoke about the reason behind the sweet snaps he and Zoe share on social media, explaining, โHe makes our day, every minute of the day, and if you can give someone a laugh or a smile, Iโve got no problem with that!โ
So, while Zoe might not be expecting a baby just yet, she does have another toddler in the house, other than Sonnyโฆ
Of course weโre talking about Hamishโs hilarious alter ego, Rory the toddler, who recently appeared on The Bachelor.
Yep, it looks like Zoe has her hands full for the time being!
