A polygamous 60-year-old pastor has married his 19-year-old girlfriend with full support of his 44-year-old first wife, who referred to her as a sister-wife. The woman is now expecting the trio's first child.

Rev Thom Miller and Belinda, his first wife, married seven years ago and have discussed polygamy throughout their marriage. The idea became reality after the couple met Reba Kerfoot.

"I've known Reba for a long time, then she moved away and I hadn't seen her for years. I caught something because she hugged me and I wanted to keep hugging her and I realised, wow, I'm really appreciating this woman," Miller told the Daily Mail.

The couple became close while volunteering at a soup kitchen together, and Reba moved in with the Millers shortly afterwards.

"At first my family thought that what we were doing was not right. They didn't think it was proper for me to be with a man that was already married," Reba explained. "But they started to come around and now they're happy as they know I am happy."

The couple married at the church Miller leads in Mansfield exactly seven years after his first marriage to Belinda.

Miller used to be a mafia enforcer and spent seven years in prison for stabbing a man in a bar fight. He stole someone's Bible in prison and, while in solitary confinement for two-and-a-half years, read it and met God. He now runs a ministry which visits prisons and is the pastor of a church in Mansfield.

"The whole situation works for all three of us," said Miller. "I am the only one who is allowed to have more than one partner and both my wives understand and appreciate that.

"I think polygamy benefits everyone because my wives get to have a much larger family - it means they always have a friend with them.

"There have been arguments in the past and at times there can be flares of jealousy but we manage to make it work.

"Sexually I have no preference and look forward to my time alone with both wives."

Speaking of her pregnancy, Reba said that the "baby will have two mums, which I'm okay with."

Belinda said: "We kind of make jokes about the baby and where he or she will sleep because we've got two separate master suites - in case mummy Reba needs a break then mummy Belinda can have the baby for the night."

Miller admits that his lifestyle is not fully supported by his congregation in Mansfield, but he does not hide it.

He said: "I don't preach about polygamy but I feel it is a very Christian lifestyle.

"I have no problem with homosexuals but I think it's wrong that their marriage is now recognised by the state but my second marriage is not.

"I'm going to try and fight the bigotry of that - this is America and my wives and I have the right to live anyway we please - providing we're not hurting anybody."