A Muslim woman has told of her shock at learning she had been secretly filmed having sex with an Asian taxi driver who is on trial accused of blackmailing her.

"Sexual predator" Farhan Mirza, 38, is accused of targeting three women, secretly filming them and then threatening to bring shame upon them and their families by publishing the videos unless they gave him money and gifts.

Mirza is accused of voyeurism, blackmail, theft and fraud - including pretending to be a doctor - in order to commit a string of offences over a three-year period.

The Pakistan-born woman, who cannot be identified for legal reasons, told jurors at Cardiff Crown Court that she was well educated with a highly skilled career.

She said it was almost two years into their relationship that she found the sex video by chance on Mirza's laptop alongside other pictures and films of him with different women.

"I was shocked - it was full of pornographic material," she said. "Different women having sex with him. He didn't have one or two - there were hundreds of them. I was there too.

"There were stills and videos. These were his photographs and videos - these were not downloaded from the internet."

The woman described to the court the contents of the video, and added: "I had no idea that he was filming when we were together, or had hidden cameras. Never, ever would I have consented to that."

She said her family, who she described as "liberal Muslim", would be upset if they knew about the video.

"As far as my family is concerned they would be extremely concerned about it. First because I did it and second because I made a video about it," she said.

She explained that in Pakistan there are groups, such as the Taliban, who would punish people for perceived immoral behaviour.

The court heard the woman was introduced to Mirza in October 2011 by a member of his family. He told her he was an IT manager for NHS contractor Sodexo, his brother was head of security at Heathrow Airport, his sister was a doctor and his father a director of a utility company in Pakistan.

"Everything was a lie," she told the court.

She went on to describe how every time they went out together she would always pay for meals and drinks and often paid out hundreds of pounds to cover shopping trips for Mirza and his family.

He also demanded large sums of money from her, including £25,000 to renovate his small terrace home in Abertillery, South Wales, which he shared with his mother, £15,000 to buy a BMW and £1,500 towards the fees for a university business course, she alleged.

The woman said she realised early in their relationship that Mirza was lying to her but continued to see him, despite confronting him.

"He knelt in front of me and started massaging my feet. He was crying and unable to speak a single word," she said. "I felt really bad and maybe he is this devastated because of me."

The woman told the jury that after Mirza asked her to tidy his wardrobe she discovered credit cards in different names, a card payment machine and £70,000 in cash.

"He was furious about it, that I shouldn't be doing these things and touching his private things," she said.

After discovering he was in fact a taxi driver, Mirza insisted he co-owned a taxi firm but later admitted he was a part-time driver, she told the court.

The woman said it was only later into their relationship - during the summer of 2013 - that he used the threat of the video to get money from her.

When she confronted him about the video, she told the court: "He said 'This was to keep women like you in her place and keep her on a straight path. I can send it to your family members and if you don't give in to my demands'.

"I was really shocked. He said 'I have got the email address of your family members and work colleagues'."

Jurors have previously been told that he met the two other alleged victims on the Asian dating website shaadi.com.

Mirza, of Arael View, Abertillery, denies four charges of blackmail, three of voyeurism, one of theft and one of fraud by false representation. The trial continues.