Tammy Kingdon claims she would have sex with Mercanti to 'calm the beast' and avoid being attacked.

Tammy Kingdon broke down in tears in court over provocative photos of her posing on a motorbike were shown.

A notorious Perth bikie's former partner, who is alleging years of domestic abuse at his hands, has broken down as provocative images of her posing on a motorbike were shown to a Perth jury.

Tammy Kingdon, 36, has testified against her partner of nearly 20 years, Finks motorcycle club member Troy Mercanti, who is standing trial this week charged with five wounding offences against her.

Prosecutors allege Ms Kingdon - who claims she was forced into posing for the photographs - was the victim of violent bashings spanning from 1997 to 2012.

Defence barrister Colin Lovett told the court Ms Kingdon's allegations were a plan to get custody of her children.

Defence barrister Colin Lovitt told a court that Tammy Kingdon used to beat her former partner Troy Mercanti.

The defence case alleges both "could dish it out" in an "unusual" and "volatile" relationship.

The pair met at the Foundry Hotel in Kalgoorlie-Boulder when Ms Kingdon was a 19-year-old exotic dancer and Mr Mercanti a senior member of the Coffin Cheaters, the District Court trial has heard.

During cross examination on Thursday, defence counsel Colin Lovitt QC asked Ms Kingdon whether she regretted forming a relationship with the bikie.

"You were delighted to be having some sort of liaison weren't you?" Mr Lovitt said, to which Ms Kingdon responded emphatically "No, I wasn't".

She had previously told the court of how she "wasn't happy" with herself for "lowering" her standards when she met the bikie, who she claims seduced her with her first ecstasy tablet.

But she had given him her phone number a few days after they first met at the Foundry, the court heard.

"I thought he seemed like a nice guy," she said.

Under cross examination Ms Kingdon snickered when questioned about being physically abusive towards Mr Mercanti during their relationship.

"No, I don't think I'm a violent person," she said.

But the court heard Ms Kingdon had a history of using illicit drugs known to cause unpredictable and violent behaviour.

"There have been many times that you've rained blows down on Troy haven't there?" Mr Lovitt asked.

Ms Kingdon has been giving her evidence by video link from an unknown location since the trial started on Tuesday.

Shown compromising photographs of herself posing on a motorcycle for a magazine shoot, Ms Kingdon broke down in tears.

She claims her former partner asked her to be in the photographs.

The jury was also shown naked images of Ms Kingdon taken for a "portfolio" before she met Mr Mercanti and told of how she was arrested for streaking across the Subiaco oval in the middle of a football game wearing a g-string and a sticker.

"In some ways it was a promotion, but also something us girls wanted to do," she said.

Ms Kingdon said she "felt now" that she'd made a "terrible mistake" getting involved with Mr Mercanti, who she shares two children with.