The wife of Italian Prime Minister Silvio Berlusconi has confirmed that she will file for divorce.
Veronica Lario reportedly said she could not be with a man who "consorted with minors" after her husband attended a female friend's 18th birthday party.
She had also clashed with her husband over his party's plan to choose certain female election candidates.
The 72-year-old billionaire prime minister said it was a personal matter that saddened him, without elaborating.
Ms Lario is Mr Berlusconi's second wife and a former actress. The couple, who have been married for 19 years, have three children, all in their 20s.
La Repubblica, a leading Italian newspaper, said Ms Lario's decision came after reading about the 18th birthday party in Naples.
"That's enough, I cannot remain with a man who consorts with minors", she was quoted as saying.
Another newspaper, La Stampa, quoted Ms Lario as saying she had been "forced to take this step".
What's happening today [in Italy] behind a front of bodily curves and female beauty is grave
"This really surprised me, because he never came to any 18th birthday party for his children, despite being invited," the paper quoted her as saying earlier.
Mr Berlusconi was reported to have bought the woman a golden necklace studded with diamonds as a present.
Following his wife's reaction, Mr Berlusconi was quoted as saying he was sorry his wife "had let herself be fooled by left-wing newspapers".
Relations with her husband were already said to be frayed after Ms Lario had criticised her husband's choice of young and attractive female candidates with little political experience to represent his Freedom Party in the forthcoming European elections.
In an e-mail to an Italian news agency, she said the plan amounted to "shameless rubbish" being put on "for the entertainment of the emperor".
"What's happening today [in Italy] behind a front of bodily curves and female beauty is grave," she wrote.
Mr Berlusconi said his centre-right party was aiming to select female candidates because "we want to renew our political class with people who are cultured and well prepared".
Candidates standing for the party would be unlike the "malodorous and badly dressed people who represent certain parties in parliament", Mr Berlusconi added.
Won third term as prime minister in 2008
Fought off a series of corruption and fraud charges
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