Cella White in the anti-gay marriage advert. "We checked with all the teachers; it never happened," John Albiston said. "I have never had any complaints that we advised the boys they could wear dresses. We didn't offer them that option. "Why would this so-called incident that never happened have anything to do with marriage equality?" Mr Albiston said Ms White had raised concerns with him about the Safe Schools program, but the school's uniform had never cropped up as an issue.

Sale pastor Heidi McIvor in the Coalition for Marriage's new television advertisement. Credit:YouTube / Coalition for Marriage "She has never spoken to me about it," he said. "You would think if she was so concerned she would have raised it." The Coalition for Marriage said the three mothers in the ad were "real mums who are bravely speaking out about their concerns".

It can be revealed that one of the mothers in the advertisement is Sale pastor Heidi McIvor, who works at the City Builders Church. "Kids in year 7 are being asked to role play being in a same-sex relationship," Mrs McIvor says in the ad, which links same-sex marriage to sex education in schools. It alleges that in countries which have legalised same-sex marriage, "parents have lost their rights to choose". On its website, the group claims that the ad will help Australians understand that "saying 'yes' to gay marriage would mean saying 'yes' to radical gay sex education in schools". Mrs McIvor told Fairfax Media that this link was fair, despite the fact that it's compulsory for Victorian state secondary schools to sign up to the Safe Schools program by 2018 whether a same-sex marriage bill is passed or not.

"If same-sex marriage is legalised I feel that we won't have any legs to stand on," she said. She also raised concerns about handouts she says were given to year 8 students as part of the Safe Schools program. The leaflets, Mrs McIvor claims, list the "full spectrum" of sexual activity including anal sex, oral sex, groping and rubbing. "They are creating an environment where they are encouraging students to experience and try things and telling them that there are so many different types of sex," she told Fairfax Media. "I am concerned that they will be considered the odd one out if they haven't tried these experiences."

Mrs McIvor is a former journalist who has worked for former Nationals MP and federal Agriculture Minister Peter McGauran, state Liberal MP Philip Davis and Family First Senator Steve Fielding. Last year she was the master of ceremonies at an anti-abortion rally on the steps of State Parliament and posed alongside Democratic Labour Party MP Rachel Carling-Jenkins. Sydney doctor Pansy Lai – who spearheaded a signature petition against the Safe Schools program in NSW – also appears in the video. "When same-sex marriage passes as law overseas these type of programs become widespread and compulsory," she says. When Fairfax Media contacted Dr Lai's clinic in Hornsby, Sydney, the receptionist passed on the phone number of the Coalition for Marriage.

Dr Lai is the founder of Australian Chinese for Families Association and has been a vocal critic of the Safe Schools program. She collected 17,500 signatures from members of the Australian Chinese community opposed to the program. ﻿The ad has been criticised by Opposition leader Bill Shorten, who said it was "offensive and hurtful to LGBTI Australians and their families". "This is exactly what was predicted when Malcolm Turnbull decided to waste $122 million on a postal survey. He gave the green light to this rubbish," Mr Shorten said. The Equality Campaign labelled the ad as "disgraceful and dishonest".