Shahnaz, 50, said Datuk Seri Mahmud Abu Bekir Abdul Taib had brought an Australian and a Russian woman to family gatherings while they were still married.
She said she was informed about his relationship with the Australian woman, with whom he had a son, named Adam.
"Her name is Louise Hiley. I'm not sure if they were married but they have a son called Adam."
She said she was later told that Hiley and Mahmud had gone their separate ways and that Adam was with Hiley.
Shahnaz, who is jazz singer Datuk Sheila Majid's sister, was testifying in the trial of her application to get RM300 million in matrimonial property and RM100 million in gifts (mutaah) as the divorce settlement.
Shahnaz is also claiming 50% of all assets owned by Mahmud Abu Bekir, Tan Sri Abdul Taib Mahmud's son. These include luxury cars, houses in various locations around the world, land in Sarawak and shares.
The divorce settlement proceedings are also exposing the purported wealth of the Sarawak chief minister’s family.
In court papers filed during her divorce application, Shahnaz had sought to have Mahmud Abu Bekir’s assets — among which she listed seven luxury cars, thousands of hectares of land in Sarawak and shares in 15 companies - declared as joint property and for it be halved.
She married him on January 9, 1992 and they have a son, Raden Myura Abdul Taib Mahmud, 20.
They were married for 19 years and four months before Mahmud filed for divorce on May 11, 2011.
"We were happy in the early stage of our marriage, but that didn't last long. After a while, our marriage was on the rocks as a result of Mahmud's irresponsible behaviour," said Shahnaz.
"We eventually divorced and I had to face a lot of problems as he was hot tempered and violent."
She also told the court that she had been deprived of nafkah batin (sexual intercourse) for 10 years during her marriage.
She added that Mahmud had also treated her unfairly as his first wife. After Hiley, he married a Russian woman.
Akbardin: How did you know he married the Russian woman?
Shahnaz: I read about it in an article in a magazine called The Peak in September 2010. He gave an interview to the magazine and had acknowledged that the Russian woman was his wife.
Akbardin: What was her name?
Shahnaz: Elena Vasilenko.
"He once came with the woman to our home and took our son out. I did not know then that they were married," she added.
Shahnaz added that prior to their divorce, Mahmud had also taken Vasilenko to his mother's birthday party.
Hearing before judge Muhamad Abdul Karim Wahab continues on September 2.
Shahnaz, now a housewife, holds an MBA in finance and was at one time a director of the family-owned Cahaya Mata Sdn Bhd.
The trial began on September 24 where various testimonies on Mahmud's assets and accounts, allegedly amounting to billions of ringgit, had been revealed.
Subsequently in March this year, the Syariah Court of Appeal, in allowing Mahmud's application, ordered a retrial before another judge, as the highest religious court in the country found that the mutaah hearing was not conducted according to procedure.
The case therefore is being reheard. - August 27, 2013.