The teen snapped a video while enjoying dinner with family, capturing Kourtney's oldest child in the background.
The TikTok influencer, 16, recorded the table as the servers brought a massive martini glass filled with an ice cream sundae.
Covered in sprinkles and filled to the brim with different flavors of ice cream, syrups, brownies, and whipped cream, the delicious dish was topped with a huge flaming candle.
Alabama zoomed in close to the delicious treat and continued to zoom until she was tight on Mason's face as he talked.
The pre-teen smiled before grabbing his own phone, and she panned her camera towards Kourtney, 42, and her father Travis, 46.
🔵 Read our Kylie Jenner live blog for the latest updates on her giving birth
The blonde tagged her brother Landon, her sister Atiana, and her future step-mom in the post, as she made sure to include them all before closing out the video.
SUPERMODEL
The group enjoyed the dessert as a celebration of Landon Barker's modeling debut.
Travis's oldest child walked the runway for designer Wes Lang, as his family cheered him on from the sidelines.
Mason's public appearances have been far and few between as he chooses to stay out of the limelight.
RARE APPEARANCE
Earlier this week, the reality star was spotted during a dinner date with his famous mom and soon-to-be stepdad.
The trio was seen enjoying dinner at Katsu-ya in Los Angeles on Monday.
Kourtney donned an oversized white Hanson T-shirt, while she pulled part of her hair back into a tiny ponytail.
Travis dressed in a graphic white T-shirt and white jeans with patch details, while Mason opted for an equally casual look of a long-sleeve shirt and sweatpants.
The group donned serious expressions as they made their way into the restaurant, while Kourtney and Travis appeared deep in conversation during their meal.
In addition to Mason, the KUWTK star and Scott share daughter Penelope, nine, and son Reign, seven.
LEFT OUT?
The newly engaged couple hit the town with Mason one month after the mother of three was slammed for "leaving him out."
The drama began when the TV star went on a skiing trip with Travis in January.
In a post documenting the trip, Kourtney cozied up with Penelope and Reign in the beachside photos, along with Travis.
Fans wondered where Mason was for the occasion, as one person asked: "How come Mason is never with y'all? It's mostly Penelope and [sic] Regan," as they added a rolling eyes emoji.
However, Kourtney clapped back and responded: "Just because he's not in the photo, doesn't mean he's not with us."
The TV personality also corrected her son's name in the fan's comment, writing: "And it's Reign," with a smiley face emoji.
Read more on the Kardashians
The Kardashians have dominated pop culture since Keeping Up With the Kardashians aired in 2007. With their headline breaking endeavors and A-list relationships, there's loads to learn about the dynamic sisters Kim, Kourtney and Khloe, plus their Jenner half-siblings. Get to know more about reality TV's first family:
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