As you've no doubt heard by now, Kylie Jenner became the world's youngest "self-made" billionaire this week.
We'll leave the debate over whether or not Kylie truly created her own wealth (she did not) for another time, but suffice it to say, she's doing pretty damn well for herself at an age when most Americans are
Several members of Kylie's inner circle were quick to offer congrats to the young cosmetics mogul.
But insiders say any praise from Kim Kardashian was quite clearly half-hearted.
The problem, it seems, is not that Kim begrudges Kylie her success.
Rather, it's that Kim believes she should be the first in her family to reach the billionaire milestone.
And of course, it's not hard to see how she might have come to that conclusion.
After all, Kim is the one who started the media empire that allowed all of her siblings to enjoy cushy lifestyles without ever having to work for someone else.
(Yes, Kim was born into great wealth as well, but she's the one who turned her family name into one of the most valuable commodities in pop culture.)
On top of that, Kim has made her own foray into the world of cosmetics, and she's reportedly peeved that she hasn't been as successful as her younger sister.
Sources say the 38-year-old believes the reason for this is that her ingenious momager, Kris Jenner, has been focusing all of her attention on the next generation of earners -- namely, Kylie -- to the detriment of her OG money-makers.
“Kim is putting all of the blame on their mother Kris Jenner and she told Kris that she totally failed her,” a source close to the situation tells Radar Online.
“Kim is not at all happy about this because her make up line KKW is doing crappy compared to Kylie’s."
Perhaps Kylie is simply putting out a superior product, but Kim believes Kris' marketing magic is the secret to the 21-year-old's success.
And Kim is reportedly quite pissed off that her mother has “abandoned her to focus on her new money-maker.”
But the insider insists that Kim is not going down without a fight.
“She is clearly trying to steal Kylie’s thunder, but it is not going to work,” the insider told Radar.
“Things between Kim and Kylie are not any better, or any worse, than they have ever been.”
And apparently, this thing goes way deeper than simply a clash over makeup sales.
There have long been rumors of a Kim-Kylie rivalry, and it seems this is the decisive victory Kylizzle has been waiting for.
“It’s just that Kylie finally has the revenge that she’s always wanted for Kim making her feel like the ugly duckling for so many years," the source says
Well, you know the old expression -- the best revenge is becoming a billionaire when you're barely old enough to drink.
Or something like that.