Man who was raised in a polygamist cult by SIBLING parents lays bare the horrifying truth about INCEST inside the religious sect - revealing he was made to do BLOOD TESTS as a child to figure out which of his relatives he could safely marry

Former members of a polygamist cult have revealed the jaw-dropping truths about the depths of incest in their family life.

YouTube host Amanda Rae spoke with Joe Robinson, whose parents were half-siblings, as he shared the unbelievable truth about growing up as members of the Kingston Group, known as The Order.

The Kingston Group, a Mormon cult whose members live in Salt Lake City, Utah, practices polygamy, with Joe revealing that members underwent a blood test to see what relatives they could marry and procreate with.

The pair have different fathers, but similar experiences with both of their dads having multiple wives. 

YouTube host Amanda Rae spoke with Joe Robinson, whose parents were half-siblings

The pair grew up as members of the Kingston Group, an incestuous Mormon cult whose members live in Salt Lake City, Utah. The cult practices polygamy

The pair said one of the commonly asked questions was about incest and deformities, which was particularly prevalent in Joe's family as his parents were half siblings and his father also married two of his mom's sisters.

'I saw like kids were born with missing ears and things like that, but it was kind of rare to really like see [more severe deformities],' Amanda, who also grew up in the cult, shared.

'I feel like a lot of the people are like attractive.'

Joe added that everyone in his family - under the patriarch Daniel, who had 14 wives and 157 kids - had a blood test to see what extended family members could marry.

'I was at my mom's house, everyone lined up got their blood tested and then they left,' Joe recalled.

'[We were] like "why are you doing this?" [and they said] "so we can see who you can marry,"' he said, adding he had a test when he was 'very young,' about the age of 10.

'They were just open about it.'

Amanda said she couldn't recall being tested, and was unsure if that was because she was possibly too young, but remembered her friends getting tests.

Joe added that everyone in his family - under the patriarch Daniel, who had 14 wives and 157 kids - had a blood test to see what extended family members could marry each other

While Joe recalled getting a blood test, Amanda said she couldn't recall being tested, and was unsure if it was because she was possibly too young

'I remember growing up in the Order, finding out that my friends were all getting tested and I was like there's something going on you guys,' she said.

Amanda added that to her knowledge, her parents weren't related. 

Joe left the Order at the age of 20 after being kicked out of the Kingston Group for questioning authority, and asking why they were neglectfully treating his mother's cancer, who passed away just before he left.

He said he grew up knowing that his parents were siblings, but was brought up to think it wasn't weird - even though he questioned it.

'My dad would [hear] rumors that we think it's weird,' Joe recalled. 

'But then he like set up a meeting, [and he'd say] like this is always going to happen, you guys need to stop making fun of it.

'You know he's like standing up for himself because he married a sibling.

Cult leader John Daniel Kingston (front and center), known as Daniel, had 14 wives and 157 kids

'My mom has two other sisters that he also married - they were all of the same family.'

Joe added that another unusual - and unfortunate -  byproduct of the cult was he could never really have a proper crush on someone  - as they were related.

'There was one crush I had in the Order, course it was my cousin,' he told Amanda.

She added: 'Because everyone you know is someone that you're related to.

'But see like same thing I had crushes and I didn't know I was related to them.'

Amanda said she witnessed strange marriages between people who were related, but felt like it had to be 'hush hush.'

'Because my dad was doing it, the leader doing it,' she explained. 'Are you really going to question the leadership, and then you have this like this bad stamp on your name?'

Amanda, who is now 28, left the Order in 2013, becoming her father Paul's first child to leave the cult.