Lauren added her new husband became protective of his phone. Four weeks later, Lauren's sister was using her mum's phone and found what Lauren claims were texts between Julie and Paul.
Her mother denied there was anything going on saying, "You're crazy."
Wall said her mum always got along with her husband, but never thought it strange. Photo / Facebook
"When I confronted Paul he went white as a sheet – and refused to let me see his phone," Lauren said.
Only days later, Paul removed his wedding ring and walked out on Lauren and their seven-month-old daughter.
When she heard he had moved in with her mum she said she couldn't believe the two people she loved and trusted more than anything in the world would treat her in such a way.
"Five months later we were getting married in a beautiful church ceremony with friends and family. Mum looked on proudly as we exchanged vows.
"He told me that he wanted to be with me for ever."
Lauren recalled how after Paul walked out she heard rumours he was living with her mother and she saw Julie walking down the street, apparently pregnant.
Lauren said: "When I saw her in the street and noticed she had a bump, my mind raced. She clutched her stomach and told me, 'It's a cyst'. I felt so sick, I went home and destroyed all the photos of our wedding."
Wall went along to the wedding to watch her mum marry the same man she had five years earlier. Photo / Facebook
She also set about getting a divorce. In July 2005, nine months after Paul had walked out, Lauren's mum, Julie, gave birth to his baby.
"She tried to claim the father was another boyfriend but I knew the truth. Paul and mum officially announced themselves as a couple that summer and my world crumbled."
Five years on from his marriage to Lauren, Paul married Julie.
Lauren even ended up going along to her mum's wedding for the sake of her daughter.
"She rang me up and invited me. It was awkward. I got married on the 14th August 2004, they married on the 15th August 2009.
"It was almost too much to bear but I did it for my daughter.
Lauren has recently found a new partner and is now happily pregnant with her fourth child, but says what happened will give her "trust issues" for the rest of her life.
"Time is a great healer, and mum and I have tried to have a normal relationship. But we will never be as close as we were – and I'll never fully trust her again."
Julie, 53, said: "We are married. We didn't have an affair. We are married and that's it."