NSW Labor MP Penny Sharpe has slammed the furore over the same-sex parenting documentary Gayby Baby as "nasty" and "ill-informed" while delivering an emotional plea for gay and lesbian families to be given equal respect.

In a speech in the NSW Parliament on Wednesday night, Ms Sharpe, a lesbian parent of three, reacted to the decision of the NSW government to ban the documentary from screening in schools hours after a front page story in News Corp's The Daily Telegraph.

"As politics and my personal life collided today what became clear was that in the eyes of some I am not normal and my children are not normal," Ms Sharpe told Parliament.

"In the eyes of some, the thousands of gay men, lesbian, transgender and intersex people and our families in our communities are not normal."