Prime Minister John Key said he didn't discuss Len Brown's affair when the pair had their monthly catch-up in Auckland this morning.
Speaking after a lunchtime engagement in South Auckland, Mr Key said it wasn't his place to comment on allegations Mr Brown accepted "freebies" from hotels while conducting his affair.
"All I can say is that I met with the mayor this morning, that's consistent with my monthly chats that I have with him and I pretty much stuck to business.
"It was really a discussion about the issues that we're contending with in Auckland, in particular around housing and transport."
Mr Brown's affair was "ultimately a matter between Len and his family", Mr Key said.