Peter Andre has branded Katie Price a 'despicable mother' for teaching their children to swear.
The 'Behind Closed Doors' singer - who raises three children, Harvey, seven, Junior, four, and two-year-old Princess Tiaamii, with the glamour model - was furious with his estranged wife when he discovered she had instructed Junior to use offensive language during a six-minute conversation between the warring couple.
The pair - who split in May after a three-year marriage - were having a heated debate, which was witnessed by Peter's manager Claire Powell and the TV crew who are filming him for his new TV series, when the furious row erupted.
A source revealed to Britain's Daily Mirror newspaper: "It all kicked off when Katie called him to let him speak to the kids. She passed on the phone to Junior who began, 'Mummy says Claire is ugly and evil.'
"In the background, Katie could be heard swearing, using the C-word. Pete was speechless. He eventually asked Junior to be put back on to mummy and read Katie the riot act.
"He called her a disgrace and asked how she could possibly call herself a mother, speaking like that with the kids present.
"Poor Pete was close to tears and visibly shaken. It was a nasty, bitter phone call and will prove hugely embarrassing to Kate if and when it does come out."
However, Katie - also known as Jordan - continued her attack and called her former manager Claire a "fat, ugly, evil ****."
Peter retaliated, calling Katie a "despicable mother".
The source added: "Kate and Pete have had some pretty hostile fights in their time, but this is undoubtedly their most explosive of all time.
"If Katie wants to present herself as a good mother, she had better pray this footage does not make it into the final edit. Pete was absolutely appalled she could swear in front of the children, let alone encourage them to mimic her vile language.