A star prosecution witness grew emotional Monday as she alleged at R. Kelly’s child pornography trial several three-way sexual encounters with the R&B superstar and the alleged victim, some of which she said were videotaped.

Lisa Van Allen, the last witness before prosecutors rested their case, also told jurors in more than three hours of graphic and dramatic testimony that Kelly last year offered her $250,000 to recover a tape of one of the trysts.

Defense attorneys accused her of trying to extort the singer.

Prosecutors rested their case in R Kelly’s child pornography trial after a day of sensational testimony about alleged trysts, extortion plots and a duffel bag full of sex tapes.

Star prosecution witness Lisa Van Allen cried on the witness stand, pausing to regain her composure, as she described several alleged sexual encounters with the R&B star, some of which she claimed Kelly videotaped.

Van Allen, 27, also told jurors that Kelly offered her $250,000 (BD94,500) last year to recover a tape of one of the trysts.

The witness said that after she and Kelly met in late 1997, they filmed each other with the alleged victim on two occasions in 1999 and 2000, although prosecutors stressed that neither tape was the recording shown the jury at the trial.

During cross-examination, a defence attorney accused Van Allen of plotting to extort money from the singer, which she denied. Under further questioning, she admitted she once stole Kelly’s $20,000 (BD7,560) diamond-studded watch from a hotel.