Josh Duggar
Josh Duggar, former Executive Director of the Family Research Council Action, was blasted by his sister's father-in-law following his admission that he had a paid account on Ashley Madison, cheated on his wife and mother of his four children, and is addicted to pornography.REUTERS/Brian Frank

Yet another member of Josh Duggar's extended family has turned against him following the revelation that he is not only addicted to pornography but has also cheated on his wife Anna. Duggar admitted committing adultery after his name was among the 32 million accounts leaked from cheating website Ashley Madison in August.

Michael Seewald, father-in-law to Duggar's sister Jessa Seewald, penned a scathing blog post against the 27-year-old father of four on 31 August. In the post, Seewald quotes the Bible and says that Duggar's hypocrisy makes him a bad Christian.

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"It distresses me to say that Josh Duggar's greatest sin is a byproduct of the sum total of his secretly sinful lifestyle. That is, that by his hypocrisy, he blasphemed the name of God. He claimed to be a Christian, but by his deeds he has suggested otherwise. With the name of God on his lips he lived a covert and extensive lifestyle of evil," Seewald wrote.

The father of Ben Seewald continued, "After hearing of Josh's scandal when he was a teenager, I publicly stated that Josh appeared to be a changed man, was walking above reproach, and living out the faith that he professed. I stood in solidarity, encouraging him to use the scandal to build humility and grace. Sadly, he had deceived us all. The name of God has been blasphemed and God is jealous for his name."

Seewald, who follows in the footsteps of Duggar's own brother-in-law, condemned the 19 Kids and Counting reality star, calling him "wicked". He cautioned however, that despite Duggar's sins against his religion and God, "forgiveness can still be obtained."

The blog post was published a day after Duggar's sisters, Jessa and Jill, and his mother Michelle appeared in a TLC documentary special on the sexual abuse of children. In May it was revealed that Duggar molested five girls as a teenager, including four of his sisters. Jessa and Jill stepped forward and identified themselves as two of his victims.

Duggar has also been slammed by his brother-in-law Daniel Keller on 25 August. Keller called the former lobbyist a "pig" for cheating on his sister Anna and said he had encouraged her to leave her cheating husband.

In the fallout of the cheating scandal, Duggar's parents announced that he had entered a rehab programme. However, the Daily Mail reported on 1 September that had been mysteriously absent from the mandatory church services of his Christian rehab facility.