Sharon Osbourne hurled a hot cup of coffee at husband Ozzy, pulled his hair and demanded a divorce after discovering his recent drink and drugs relapse.
The Black Sabbath star went public with his troubles earlier this year, admitting he had turned to booze and prescription pills again after previously overcoming his demons.
Sharon has now lifted the lid on the drama that went on behind closed doors, revealing she found out the extent of his substance abuse while looking through his mobile phone on their 30th wedding anniversary.
In extracts from her new book Unbreakable, printed in Britain's The Sun on Sunday, Sharon writes, "Normally I'd never do something like that but I was a desperate woman. It didn't take long and boy, did I find a load of ugly s***. There were texts going back months, asking people for drugs and saying, 'Don't tell the old girl'."
Sharon eventually confronted Ozzy, who promised to go back to Alcoholics Anonymous and attend counselling, but he fled to their UK base to continue boozing - and she retaliated by selling off his prized car collection.