The National leader Simon Bridges has denied any responsibility for the smear campaign against the Prime Minister's partner.
The Police have taken the unusual step of issuing a statement about an individual - in this case Clarke Gayford - in response to persistent rumours.
The Police say Mr Gayford, is not, and has not been, the subject of a police inquiry, nor has he been charged in relation to any matter.
Jacinda Ardern made this statement to reporters on her way into Parliament this afternoon.
"To me it doesn't matter what you call it, and I won't be pointing any finger of blame to anyone.
All I know is it's not why I'm here, it's not anything to do with the job that I need to do, so I'm just going to keep getting on with it and I'm going to smile through it as well," Ms Ardern said.
She was asked if she knows who's behind the campaign.
"I'm not going to point fingers of blame, it doesn't matter to me who is involved or what you call it - my job is an important one and I need to get on with it and I will."
A few metres away the National Party leader Simon Bridges condemned the smear campaign.
"I think it is totally unacceptable, look my sympathy to the Prime Minister and her partner Clarke Gayford - politicians families should never be drawn into politics in this way," Mr Bridges said.
The New Zealand First leader and deputy Prime Minister Winston Peters was asked for his response.
"This is part of a dirty campaign and it's been going on for sometime, it's baseless clearly from the police denial and I should say it's just a part of the black-ops politics."
And he was asked who thought was behind it.
"The only people who could be behind it are the people who seek to be politically advantaged by it...I'm leaving it for you to come to the conclusion," Mr Peters said.
Mr Bridges said to the very best of his knowledge National has had nothing to do with spreading the rumours.
"I've made very clear to National MPs a number of times that they are not to, and I won't tolerate them pedalling rumours or innuendo in this way.
I have certainly made clear there are rumours that go around about politicians and their families but they're nearly always false," Mr Bridges said.
Mr Bridges was asked what he made of the media publishing stories about baseless rumours.
"Well you know, I think you would want to be pretty reticient about that in fairness, because the danger is, as I've said with my caucus, that in doing that you are pedalling the rumour, the innuendo itself," Mr Bridges said.
The Greens co-leader James Shaw said his party has a long-standing tradition of not commenting on politicians families.
"I'm not going to comment on it, it's an untrue rumour I don't think it has got any basis in fact - I don't think it is a story to tell you the truth."
