Former Italian prime minister Silvio Berlusconi  hosted prostitution parties at his Milan villa and paid women with favours and cash, prosecutors at his trial said.
Both he and Mahroug - better known by her stage name "Ruby Heartsteale r" - have denied ever having sex.
A verdict in the trial is expected later this month.
Prosecutor Antonio Sangermano said that the parties organised at the villa in Arcore, north-east of Milan, were the "expression of a tried and tested prostitution system organised to satisfy the sexual pleasure of Silvio Berlusconi, and of which the young Moroccan girl was completely a part."
In his closing arguments, he said that the parties involved dinner, erotic dancing and then sex between aspiring television starlets and the invited guests.
Berluscon i said that he was "a bit surprised and amused" at the "imaginative" description of his "infamous dinners".