The 'X Factor' UK judge was surprised her husband - whose drug and alcohol addiction spiralled out of control over the last year - wasn't ''mortified'' when she told him she wanted to end their 32-year marriage after giving him a second chance.
Writing in her book 'Unbreakable', she said: ''As soon as he spoke he was cocky and arrogant. There didn't seem one shred of remorse.
''Something snapped. I thought, 'I can't carry his s**t any more. It's what I have always done, and I'm tired.' I said, 'I want a divorce' ... He didn't look shocked.
''I don't think he believe me, but at the time I meant it wholeheartedly. I was expecting him to be mortified.''
Sharon then demanded ''half of everything'' and £100,000 a month, knowing ''the thought of losing'' money would have a huge impact on the Black Sabbath rocker.
The two then brawled after the 60-year-old star threw coffee over Ozzy.
She continued: ''I knew money was Ozzy's Achilles heel, and the thought of losing it might have more impact than the thought of losing me. 'No f***ing way. Over my dead body', he said.
''My Achilles heel is respect, namely the lack of it, in other people. I felt he was being dismissive, so that was it. Snap. I was drinking a cappuccino and the whole lot went on his head - the coffee, the cup and the bloody saucer.
''Then I grabbed him and pulled at his precious hair with one hand, while trying to yank off his jewellery with the other.''
Take a look back at October's inaugural event.
The film is expected to continue without Mendes' involvement.