Viewers got a glimpse into Cory's intense fitness regimen as he underwent a gym session with a friend.
The pair recorded themselves doing a series of ab exercises while balancing on a set of dumbbells.
However, fans' eyes were more drawn to the father of two's chiseled mid-section, garnering thousands of likes on the post.
The Teen Mom 2 star's time in the gym comes as his girlfriend, Taylor Selfridge, is expected to give birth to their second child any day now.
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Last month, Taylor showed off her baby bump while cuddling her daughter, Mila, two, on her Instagram Stories.
She cradled her baby bump in a blue dress with flowers.
The edge of her hair can be seen in the frame, and her nails are manicured.
Mila is looking down at her iPad and playing a game on it.
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In the following story, Taylor posted a photo of Mila outside in a bathing suit eating a freeze pop.
She captioned the story "Toasty outside today" with a melting face emoji.
Cory, 31, is also a dad to a five-year-old daughter, Ryder, with his ex, Cheyenne Floyd, 29.
BOY OR GIRL?
With her due date so close, the couple has yet to reveal the baby's gender.
However, fans think they might have accidentally revealed it recently.
The Instagram video, captioned "Two years later... .we tried it again," shows the Wharton family playing a gender reveal game in which they race to finish the color-coded Fruit by the Foot.
Taylor, 27, Mila, and Ryder, rushed to gobble down their pink candy tape while The Challenge star, the lone male, consumed the blue.
The race was over before it started as Cory inhaled his fruit snack to take the win in a landslide victory.
He unleashed a victorious howl that startled baby Mila to celebrate.
After sharing the video, fans speculated if this was a way for the couple to hint at their baby's gender.
"Does this mean your new baby is a boy!" asked one fan.
"Does this mean you are having a boy? You had the blue color and devoured it...no but seriously is it a boy?" commented another curious follower.
In March, fans thought the couple subtly hinted that they were having a boy.
In the photo, Taylor holds the black-and-white image of the ultrasound in one hand and Mila in the other with some help from baby daddy Cory.
The foursome, including Ryder and sister Mila, all wore off-white attire, making vibrant colors stand out like the blue on Mila's hand.
MOTHER'S DAY
Taylor also showed off her growing bump in a Mother's Day post with Mila, Ryder, and her soon-to-be-born baby.
The expectant mother posed in a nude dress as she cradled her stomach.
All three posed in front of a beige background as the girls wore cream dresses.
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She captioned the post with a simple, "Happy Mother's Day," and added a flower emoji.
"I'm so blessed to have you 3, I love you all with all of me," Taylor went on.
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