It's a hot topic in the family these days. 19 Kids and Counting standout Jessa Duggar and her husband, Ben Seewald, shared a sermon called "The Passions That Prevent Adultery" on Monday, Aug. 31, in the wake of her big brother Josh Duggar's recent cheating scandal.

Citing Pastor John Piper's DesiringGod.org, the pregnant reality star excerpted one of his messages about adultery on her Facebook page. Her husband also shared the link on his social media pages.

"In three minutes, John Piper explains how God cures our heart’s broken desires for sin," Duggar, 22, posted from Piper's website. "When the Bible calls us to live like Christ, it doesn’t merely give us a set of commands. It presents us with something compelling and captivating that changes our minds, and then our hearts. The gospel convinces us of something irresistibly true, and then transforms our desires for something new. That conviction and passion keeps us out of bed with someone who’s not our spouse and rejects a thousand other temptations."

Duggar also shared a direct link to Piper's message, which comes from 1 Peter 1:13-16. "Ninety-nine percent of what you do is out of the abundance of the heart," the pastor says to his congregation. "The mouth speaks, the arms move, and you live… As obedient children, that's what we want to be, children of God, we should not be formed… conformed… conformed by passions that are rooted in ignorance."

In 3 minutes, pastor John Piper explains "The Passions that Prevent Adultery." -Click the link in my bio to watch- A photo posted by Jessa Seewald (@jessaseewald) on Aug 31, 2015 at 4:21pm PDT

The married couple's latest social media update overlapped with Ben's dad, Michael Seewald, sharing a scathing blog post on Monday, in which he called his beleaguered in-law Josh a "pretender" amid the father of four's cheating scandal.

"In commenting on this I do not wish to add any more distress to a family still recovering from the indignity of the publication of a police report detailing Josh’s sins as a teenager," Jessa's father-in-law wrote on his family's blog. "Though I have never gotten to know Josh very well, I have great respect for his sorrowing parents and immense sympathy for his dear wife, Anna, and their four children. I myself have been mourning over the irreparable damage that has been done to many by this whole circumstance, yet the reason I feel obliged to make these remarks is an overwhelming desire to vindicate the name of God."

The Seewald family patriarch, who previously appeared on TLC's 19 Kids and Counting with the Duggars, condemned Josh for his recent actions.

"While proudly saying things like, 'Our family is like the epitome of conservative values,' he was looking at porn and soliciting affairs. He took a job at the Family Research Council that exists to promote the traditional family, all the while undermining his own family by violating his marriage covenant. He flourished in the fame of his family and the success of their television show, all the while betraying their trust and Christian values," Michael wrote. "To the person reading this, I want to caution you. Josh was a pretender," he wrote. "True Christians fail often, but their lives are truly being conformed to the image of Christ. Do not look at Josh and justify your own sins by dismissing the reality of genuine faith and a holy God."

As Josh's parents confirmed last week, the eldest Duggar child, 27, checked himself into a long-term treatment center last week. "For him it will be a long journey toward wholeness and recovery," Jim Bob and Michelle Duggar reflected. "We pray that in this he comes to complete repentance and sincere change."