Tony Golossian, 62, Arthur Psichogios, 40, and his wife, Frances Psichogios, 39 have pleaded not guilty to charges, The (Sydney) Daily Telegraph reported Thursday.
Crown prosecutor Sarah Huggett said victims were told curses had been put on them and that to remove the curses they had to attend "prayer sessions" where they were blindfolded and sex took place.
The women also received phone calls from "demonic voices," Huggett alleged.
The fiance of one of the victims also received similar calls telling him not to marry the woman, calls Hugget said were designed to isolate her.
The man testified he broke up with his fiancee after the phone calls told him she was sleeping around, the jury in the black magic sex trial heard.