For years, millions of hot-blooded Italian men have secretly wished they could gatecrash one of the parties hosted by their ebullient prime minister, Silvio Berlusconi, featuring scantily-clad starlets and models, and endless bottles of expensive wine.

But now the bacchanalian gatherings are coming back to haunt Mr Berlusconi. The billionaire businessman, 72, is trying desperately to fend off allegations that an acquaintance paid call girls, wannabe actresses and models to attend the parties. Uncharacteristically, the scandal seems to be getting to him. He is tired, flustered - and worried, because it is threatening to overshadow his hosting of the G8 summit in L'Aquila next month. A national joke is turning into an international humiliation.

Attention is focused on a party that the prime minister held at his Rome palazzo on the evening of November 4 last year - the night of the US presidential election. A couple of days ago, one of the young women who attended the event, former Miss Italy contestant Barbara Montereale, 23, dropped a bombshell by claiming that Mr Berlusconi went to bed with another of the women in attendance, Patrizia D'Addario, 42, who was allegedly promised 2,000 euros (£1,700), and who herself claimed that when she saw the gathered women, she thought: "But this is a harem."