Kourtney Kardashian's recent trip Down Under was a whirlwind of family fun, PDA with hubby Travis Barker... and a surprising snub from her eldest son, Mason. Is there trouble brewing in Kardashian-Barker paradise?

Picture this: sun-drenched beaches, private yachts, and the infectious energy of a Blink-182 concert.

That's the idyllic scene Kourtney Kardashian envisioned for her family's Australian adventure. And while she basked in the glow of newlywed bliss with Travis and their blended brood, a shadow loomed over the trip: the absence of her eldest son, Mason.

Heartbreak in the Headlines: Mason Ditches Aussie Adventure for Dad Time

The eldest of Kourtney's children opted out of the family vacation, choosing instead to stay home in California with his father, Scott Disick. Cameras captured Kourtney's visible disappointment as she confessed her feelings in a confessional interview.

"It was really sad for me," Kourtney admitted, her voice heavy with emotion. "But I'm trying to focus on the positive and make the most of every second with the kids who are here.

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Fans were quick to offer their support, flooding social media with messages of understanding.

"It's got to be tough, juggling a blended family and teenagers," one fan commented.

"Hope Mason knows he's loved and that this doesn't diminish Kourtney's happiness," another added.

PDA Overload: Reign Calls Out Kourtney and Travis's Steamy Antics

Meanwhile, Kourtney and Travis seemed determined to make the most of their time together, engaging in some serious PDA that had even their kids raising an eyebrow. During a luxurious boat trip, Kourtney and Travis were caught in a passionate embrace, much to the chagrin of young Reign.

"Mom! Stop making out with Travis, bro!" he exclaimed, his voice a mix of amusement and exasperation. "Like, didn't you just have a baby? Don't get another one this quick!"

The comment elicited laughter from the couple, with Travis even leaning in for a playful neck kiss.

"Are you giving her a hickey now?" Reign shouted, his voice echoing across the deck.

Kourtney Claps Back: "There's Nothing Wrong with Showing Affection!"

Kourtney, unfazed by her son's playful protests, defended the couple's displays of affection.

"I think it's a beautiful thing to see parents, especially ones that just had a new baby, be affectionate and loving," she explained. "There's nothing wrong with that."

But while Kourtney might be all about keeping the romance alive, some fans expressed concern over the constant PDA, especially in front of the children.

"I get it, they're in love," one fan commented. "But maybe tone it down a notch when the kids are around?"

Blended Family Dynamics: A Balancing Act

Kourtney and Travis's whirlwind romance, culminating in a lavish Italian wedding, has captivated fans worldwide. But their blended family dynamic, with children from previous relationships, adds a layer of complexity to their happily ever after.

As Kourtney navigates motherhood, a new marriage, and the ever-present spotlight, she faces a challenge familiar to many: finding a balance between her own happiness and the needs of her children.

Whether Mason's absence was simply a case of teenage independence or a sign of deeper issues remains to be seen. One thing's for sure, though: the Kardashian-Barker saga is far from over.