Everything comes back to Craig and MacGregor, to Colin and Rachel, up a tree, k-i-s-s, i-n-g - just once, on election night in November 2011.
"The election night incident," said Craig.
"The election night event," said Slater's lawyer, Brian Henry.
Craig took the stand on Monday and talked about the kiss.
"We had fallen short of our Christian values," he lamented. But they agreed not to let it go any further than that, he told Justice Kit Toogood.
Toogood nodded, and said, "And by that, do you mean actually having a physical sexual relationship?"
His Honour had introduced the dread word into the courtroom: sex. Craig gulped, and said, "Correct."
A bright light shone on Toogood's bare skull. It was like a spotlight; and as he asked Craig numerous questions about his "affair of the heart" with MacGregor, it became evident something else was going on. If you listened really carefully, Toogood was actually singing the rock classic by Foreigner: "I want to know what love is. I want you to show me!"
Craig talked about the back massages MacGregor gave him, the time he looked down her top, an anguished conversation on a flight from Napier to Auckland.
"If we were both free to do so," he said to Toogood, who was all ears, "I think we would have had a sexual relationship."
The opening line of this story is a question posed by the great English band The Buzzcocks. It was the title of their 1978 smash hit.
In Craig's version of events, his desire for her had faded, but MacGregor was reluctant to simply remain friends.
So much music, so little joy. Toogood studied Craig, the Foreigner song no doubt blaring inside his head.
The country dirge also played on in court, slow and endless, as Craig continued to describe the unrequited office romance that went horribly, horribly wrong.