Grant Davies with students from his RG Dance studio.

Grant Davies with students from his RG Dance studio. Photo: From Facebook

A Sydney man whose wife sent scores of sexually explicit pictures of their young daughters to a now-disgraced dance teacher says she must have been under the teacher's "manipulative spell" because "my wife has always acted in the best interests of the children".

The woman, who cannot be named, has admitted in court to sending the photographs for more than two years to renowned dance teacher Grant Davies, who allegedly told her the pictures made him "excited and horny".

The court heard that Mr Davies, the co-director of the now defunct RG Dance at Chiswhick, requested the photos via text message and in person.

Grant Davies from RG Dance who is facing child pornography charges.

Grant Davies from RG Dance who is facing child pornography charges. Photo: From Facebook

In response, she sent at least 100 explicit images which, the court heard, she carefully choreographed.

Mr Davies is also before the courts facing child sex offences.

The woman has previously claimed she could not say no to the dance teacher as she had become totally "obsessed and focused" with the girls and the dance studio, whose students had gone on to perform in major productions and dance overseas.

She said she and her children were scared of Mr Davies and she "did everything he told me to do".

On Friday, during the woman's sentencing in the Downing District Court, the woman's husband, a senior manager for a corporate entity, said he still loved his wife.

"Despite everything that's happened she's not a bad person," he said.

"She unfortunately, I believe, came across a very evil person and was just too weak to resist."

When it was put to him that, over that two-and-half year period the woman sent the pictures, and a number of videos, she didn't act in their interests, the man refused to accept that this was the case.

"My wife has always had my children's best interests to heart," he said.

"She did bad things... but those things wouldn't have happened if not for that other person taking control of my family. This person controlled my family.

"She had always been a loving mother. The only way I can explain what happened is that she was under some kind of spell cast by that person.

"Her behaviour around that time, I can only describe it as being the kind of thing you read about with people involved with cults."

Judge Peter Zhara said it was likely the woman would face full-time custody, but that the length of this custody would be limited by the need for the two children to see their mother, who had continued to have a role in their lives, even after the charges were laid.