In the first snap, Michelle poses for a selfie, while holding Axel on her shoulders, in front of some playground climbing equipment.
The delightful toddler – who is wearing a blue and white striped shirt and baseball cap - snuggles up to his mum, as they pose for the candid shot.
A follow-up pic shows Axel leaning over his mum’s shoulders to cast a more playful expression for the camera.
Fans were seemingly delighted to see the update pics, with one person writing: “This photo is just beautiful.”
Another person added: “You can tell he is your pure joy.”
A third person simply stated: “Those eyes”, referring to little Axel’s bright blue peepers.
Michelle’s adorable post comes after she recently sparks marriage rumours, after she posted a cryptic Instagram post, which suggested she and Steve had tied the knot.
‘Inevitable…’ Michelle captioned a photo of herself and Steve in what appeared to be wedding attire, along with a love heart, praying hands and pursed lips emojis.
It turned out the black and white snap was actually a throwback photo from an awards ceremony two years ago.