Rumors of a feud between Jill and Jessa Duggar began earlier this month when eagle-eyed fans noticed that Jill doesn't follow her younger sister on Twitter.
It seemed strange, especially considering Jill follows all of her other relatives who have accounts, as well as various randoms like Wal-Mart and Rick Santorum.
But hey ... maybe she just forgot, right?
Well, that excuse may have held water were it not for the fact that at this point, the perceived Twit-diss has been reported by several major media outlets.
Meanwhile, Jill still hasn't done anything to rectify the situation.
Of course, it's equally strange that Jill doesn't follow Jessa's husband, Ben Seewald, (even though they both follow her), but still, many find it hard to imagine a raging sibling rivalry in such a seemingly harmonious family.
So an account of the feud offered in the latest issue of Star magazine may help the family friction feel a bit more believable, and serve as a reminder that despite their fame and strict beliefs, the Duggars remain a family with problems like any other... and sometimes sisters just don't get along:
"This has been brewing," an insider tells the tabloid. "Now that the girls and their marriages have become a bigger focus on the show, their problems are escalating."
"Jessa resents that Jill is her parents' favorite, and she's pulling away from the family. And Jill doesn't approve of the choices that Jessa is making."
The most recent controversial "choice" was Jessa's decision to get married November 1 in a venue other than the Duggar's family church.
Jill, for her part, apparently considered the move to be a nigh-unforgivable betrayal, as well as a sign that her sister is changing for the worse:
"Jessa is able to live by herself now, without the crazy rules," the insider claims. "She is learning who she wants to be, but Jill stayed pretty much the same when she left home."
This week, Jill and Jessa attempted to quash feud rumors with a recent Instagram post that showed them enjoying a double date with their husbands.
The source says that was all for show, however, and claims that Jessa and Jill will be forced to "sit at opposite ends of that long table during Christmas dinner."
The plot thickens. As always, you can watch 19 Kids and Counting online to look for signs of tension between these two and the rest of their siblings ...