The scandal follows the recent response where Abby and her sister Brittanyfired back at trolls.
Us Magazinereported that Joshua and Gavin have been requested to submit their DNA to determine paternity.
In 2019, the parents broke up, and Annica subsequently gave birth to another daughter in 2020.
She is now three years old.
However, court documents did not make this detail available, as she is a minor.
Moreover, in Annica and Joshuas 2022divorcepapers, the younger daughter is referred to as Isabellas half-sister.
There have also been pictures showing the now-stepmother Abby laughing with Isabella and hugging her.
They first shared their story in 1996 on The Oprah Winfrey Show.
The TV series followed them as they prepared to graduate from Minnesotas Bethel College and latertraveledto Europe.
The sisters are dicephalous-conjoined twins, which means they were born fused together at the torso.
While Brittany controls the left side of their body, Abby controls the right.
But our parents never let us use that as an excuse.
We were raised to believe we could do anything we wanted to do, they further explained.
The sisters have always kept low profiles and were never interested in revealing information about their love lives.
Shes trying to sabotage their marriage, a reader speculated
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