Back in August, Joy-Anna Duggar announced that she's pregnant and ever since, fans have been regarding her claims about her conception date with serious skepticism.
According to Joy, she got pregnant just days after marrying Austin Forsyth.
When she made her announcement, the 20-year-old newlywed stated that she was roughly three months along.
Fans cried foul and began speculating that Joy had gotten pregnant out of wedlock and was misleading the public in hopes of concealing that fact.
To the theorists' credit, there's an awful lot of evidence to support that claim.
Before their wedding, Joy-Anna and Austin admitted to breaking her family's "courtship rules," but did not go into detail with regard to the extent of their violation.
(Joy's family is so strict that they may have broken the rules simply by holding hands for too long.)
So from the start, fans suspected Joy and Austin of defying her parents by engaging in premarital sex.
The fact that Joy sported a sizable baby bump in her announcement photo only added fuel to the fire.
In the months since, speculation has only grown, with several tabloid outlets speaking with doctors who examined photos and confirmed that Joy is further along than she claims.
Now, we're being presented with perhaps the most compelling evidence to date that the Duggars have something to hide, thanks to a family insider who's confirmed to Radar Online that Joy's due date is being kept under wraps.
“They don’t really want the due date shared,” the insider says.
“They prefer to keep it private.”
Joy's mother and several of her sisters and sisters-in-law have gotten pregnant in the public eye, and this is the first time that any of them has made any effort to keep their due date a secret.
Earlier this week, we learned that Joy will not reveal the gender of her baby, and many fans believe the reason is that Duggar gender reveals are typically accompanied by dated sonogram photos.
Obviously, if Joy is misleading fans about her date of conception, it would be difficult for her to post any such medical information without giving herself away.
It's impossible to say with absolute certainty that the Duggars are being less than truthful with regard to when Joy's pregnancy began.
But each new day seems to bring new evidence to that effect.
Watch Counting On online for more from reality TV's most controversial family.