Court records viewed by DailyMail.com show Annica filed the suit against Josh and another man named Gavin Vatnsdal.

Josh and Annica married in 2010 then split in 2019, according to court records. They currently share custody of their 8-year-old daughter, Isabella.

Josh and Annica's divorce was finalized on April 23, 2020, then Annica had another child later that year who in court documents is referred to as 'Isabella's half-sister.'

It is unclear which child paternity is being tested for, but a genetic test report was filed to the court on March 7 that is not available for public viewing.

Josh's daughter attended his wedding to Abby, sporting a floral bridesmaid's dress and walking down the aisle, holding a sign that read: 'Daddy... Here Comes Your Bride.'

It's likely the father-of-one, who works with hospice patients, and the twins live with one another, with Josh's Facebook page showing the family - including his young daughter - enjoying hikes in nature, ice cream and dressing up for Halloween.

Abby and her sister Brittany, one of only a few sets of dicephalus twins in history to survive infancy, rose to fame on their eponymous TLC show which chronicled their major life events, including their high school graduation and job hunting.

On TikTok account @abbyandbrittanyhensel, a clip was recently posted showing off Abby's wedding day - and a Facebook account titled Britt And Abby also featured a picture of the happy couple.

For the ceremony, which records revealed took place back in 2021, the twins sported a sleeveless wedding dress with lace trim detailing while the groom wore a grey suit.

A video thought to have been captured by one of their guests and shared on social media showed the twins and the groom enjoying a dance during the big day. 

The conjoined twins broke their silence last week after news emerged that one of them is now married.

'The internet is extra LOUD today,' the twins, 34, said on their joint TikTok account on Thursday after the world learned that Abby had married Josh. They didn't share any images online until last year.

Abby and Brittany shared images of ancient sculptures depicting conjoined twins and added: 'We have always been around.'

They also posted another TikTok showing a photo with Josh and wrote: 'This is a message to all the haters out there.

'If you don't like what I do, but watch everything I'm doing, you're still a fan.

Abby and Brittany are now both fifth grade math teachers at an elementary school in New Brighton, Minnesota, where they were born and raised. 

The pair share a single body, and from the waist down, all their organs, including the intestine, bladder and reproductive organs, are shared. 

In a documentary filmed when the girls were teenagers, their mother said they were keen to have children of their own one day, explaining: 'That is probably something that could work because those organs do work for them.'