Those "inspirational" photos posted by Instagram fitness models are so rarely believable.

More often than not, social media celebrities are all about glossy perfection: lots of tight abs, smooth tan, groomed brows, and very little #realtalk about the messy realities of life.

fitness personality Chontel Duncan has just taken a different track, though. On Friday, she posted a photo that almost all moms will relate to—and we're absolutely loving the frank, hilarious image.

In the photo, 27-year-old Duncan is pictured cradling her bare-bottomed son Jeremiah.

The look on her face is equal parts confusion and disgust—because her four-month-old son has just let loose a sloppy green poo all over her arm.

#We'veAllBeenThere

A photo posted by Chontel Duncan (@chontelduncan) on Jul 21, 2016 at 8:00pm PDT

"The joys of parenthood," Duncan joked in the caption.

"Hope this put a smile on all of your faces. HAPPY FRIDAY from Jeremiah."

The image got liked more than 17,700 times in just 18 hours.

A photo posted by Chontel Duncan (@chontelduncan) on Jun 26, 2016 at 9:18pm PDT

Brisbane-based Duncan, who has 567,000 followers on Instagram and is the founder of fitness training organization Hiit Australia, made headlines earlier in the year for posting a sweet pregnancy photo comparing her pregnancy bump with her friend's. The photo went viral—as did the follow-up comparison image, which Duncan posted once she and her friend had given birth.

A photo posted by Chontel Duncan (@chontelduncan) on May 19, 2016 at 12:01am PDT

Chontel and her husband Sam welcomed little Jeremiah on March 25th, and he's every bit as photogenic as his mom.

Since becoming a parent, the Instagram sensation has posted a number of adorable mom and bub workout snaps, calling her little boy her “favourite training buddy”.

A photo posted by Chontel Duncan (@chontelduncan) on Mar 31, 2016 at 5:13am PDT