The sex-crime accusations facing the Italian prime minister, Silvio Berlusconi, are mounting. Prosecutors now believe that Iris Berardi, a 19-year-old Brazilian showgirl, was underage when she went to Berlusconi’s summer villa in Sardinia in November 2009 and his palazzo near Milan a month later. Documents suggest she attended sex parties hosted by the 74-year old before her 18th birthday. Berlusconi is already accused of paying for sex with a teenage nightclub dancer known as Ruby the Heartbreaker. He is also accused of abuse of office for pressuring police to release Ruby on theft charges. These latest allegations were contained in a 227-page dossier submitted to a parliamentary committee on Wednesday by prosecutors who are investigating allegations that Berlusconi hand-picked prostitutes for wild parties. The dossier contains details about how Berlusconi and his friends were entertained by showgirls seeking career advancement.