Some sources close to her believe that Anna's controlling mother and father forced her into the marriage despite countless red flags, though.
Anna's devoutly religious parents and rebellious siblings may not have engaged in any behavior on par with Josh's, but they're ... interesting.
Let's just say they're not as squeaky-clean as you might think.
Check out our run-down of Anna Duggar's unexpected family history - and the Keller family's darkest secrets - in the gallery below:
1.
Anna Was FORCED to Marry Josh?
Anna knew about the allegations that Josh had molested four of his sisters before she agreed to marry him. She accepeted his proposal anyway, some say at her parents' insistance.
2.
The Kellers Remain Devoted to Disgraced Minister Bill Gothard
Like the Duggars, the Kellers joined Bill Gothard's Institute in Basic Life Principles several decades ago. Unlike the Duggars, the Kellers have yet to distance themselves from the minister, who is currently under investigatuon for sexual abuse.
3.
Mike Keller Led a "Life of Sin" in His Youth
Anna's sister, Priscilla, has revealed that her father was prone to bad behavior before he converted to Christianity at 19, but she has repeatedly refused to go into detail. “God truly redeemed my dad’s life from sin and gave him a tremendous freedom from the past.”
4.
Mike Keller is Estranged From the Rest of the Family
None of the family has any contact with Anna's older brother, Mike. Anna's parents and sister have refused to reveal why this is the case.
5.
Susanna Keller Has Also Cut Ties
Anna's younger sister, Susanna Keller, had a baby out of wedlock as a teen. Now 23, Susanna has moved to Texas and renounced her family's fundamentalist ways.
6.
Anna's Oldest Sister is Getting a Divorce
Anna's oldest sister, Rebekah McDonald, is in the process of getting a divorce. That's a major no-no in the insanerly strict Keller family.
7.
But Anna's Parents Won't Let Her Leave Josh
When Josh first checked into rehab for sex addiction, Anna went to Florida to seek counsel from her parents. Some say she asked for their permission to seek a divorce, but they informed her she would be disowned if she left her cheating husband.
