Following revelations of Auckland Mayor Len Brown's two year affair with Bevan Chuang, here is a look back at sex scandals which have rocked New Zealand politics.
A sex scandal hurt Darren Hughes' promising career in April 2011. Mr Hughes resigned from Parliament after it was revealed police were investigating a sexual complaint laid against him by an 18-year-old man. Mr Hughes always denied the accusations and police did not lay charges against the former Labour MP. Before the accusation and his subsequent resignation, Mr Hughes was a star in the Labour caucus and was tipped as potential party leader. He moved to the UK in 2012 to become the Campaigns and Research Director of the Electoral Reform Society.
MP Shane Jones' star was rising until a furore erupted after he admitted to using his ministerial credit card to order hotel porn movies. Mr Jones stepped down following the revelations and the money was repaid. Mr Jones returned to the Labour Party and is now ranked number five following his failed leadership bid this year. He is the Economic Development spokesman for the party.
Rumours of affairs and a love child circulated about Don Brash when he took leadership of the Act Party. Mr Brash denied the claims. His second marriage reportedly fell apart in 2008 after an alleged affair with deputy chair of the Business Round Table, Dianne Foreman.
Paul Findlay withdrew from the Christchurch local body election race after a personal conversation on a social media application was leaked online last month. Explicit photographs and written messages included in the conversation with what appeared to be a 15-year-old were revealed. Police did not launch a criminal investigation into the social media postings involving the former People's Choice candidate.
Former Labour MP Dover Samuels was forced to stand down in 2002 by the Prime Minister at the time Helen Clark during an investigation into allegations of inappropriate sexual behaviour. Ms Clark was forced to sack the former Minister of Maori Affairs after he refused to offer his resignation amid the claims about a teenage pregnancy and the issue of the imbalance of power in a relationship in the 1980s. There were also allegations of an abusive relationship, assault, and a threat to shoot. He denied the claims and Ms Clark later acknowledged Mr Samuels' family suffered hurt and injustice in the scandal. He was cleared by police and regained ministerial status.
Former Prime Minister David Lange married Naomi Crampton in England in 1968 and they had three children. At the age of 47, Mr Lange ended his marriage of 21 years and Naomi later said in a newspaper interview that her husband had developed a "fantasy thing" for his 37-year-old speechwriter, Margaret Pope. Mr Lange had been engaged in a two year affair with his speechwriter. He married Ms Pope in 1992 and they had one child, Edith. Ms Pope opened up on the most sensational affair in the country's political history in her book At The Turning Point.