Since then he has vehemently denied lying about his contact with the blogger, saying he thought the question was in relation to another report, also blaming the release of three reports containing a huge amount of information on one day, time pressures and noise in Parliament.
It's not a good look, much like admitting deleting texts within a day or two of sending them.
Earlier news reports say Mr Key refused to answer questions about his contact with Mr Slater, saying it was in his capacity as National Party leader, not as Prime Minister.
That really doesn't cut it. When you're Prime Minister, everything, even dropping your kids off at school, is done in your capacity as Prime Minister.
Labour leader Andrew Little, who is dining out on events this week, couldn't have asked for a better start to his new role.