Disclaimer: Nope, I didn't create them, nor do I claim them as my own.

If he hadn't actually witnessed the entire spectacle with his own twinkling eyes, Albus Dumbledore would have never in a Sphinx's age believed it. And if some of the more adventurous staff had suggested the idea with reference to a wager as to it's likelihood, the Headmaster of Hogwarts School of Witchcraft and Wizardry would now be quite bereft of several thousand Galleons, such was the improbability and thus astronomical odds against it happening.

Had Minerva McGonagall ridden starkers Godiva-style through the great hall on the back of Hagrid's slobbering canine companion, no-one in the vicinity of the spectacle would have batted an eye, as such an escapade would have been deemed quite mundane in the face of the Headmaster's recent visual encounter. Possibly only the sight of Argus Filch relieving what must be decades of unwitting celibacy with the complicity of Mrs Norris could have been any more disconcerting.

But seen it he had.

He had merely been taking a short breather from the tediously large mountain of Ministry paperwork. A pleasant walk through the castle grounds, blowing away (quite literally) cobwebs, taking the air and other overused euphemisms for a procrastinating skive. However.

Whether it was a phenomenally astute act of serendipity, or simply a ploy by it's lesser brother coincidence would never be firmly established. But whatever fates had conspired that day had decided that Albus Dumbledore should happen to round a corner and find himself in line of sight to his esteemed Potions Master. Not such an extraordinary event in itself, had it not been for the sudden appearance of one Hermione Granger, Head girl and student extraordinaire. In fact the entire tableau would have remained unremarkable but for the resolute striding over to said Potions master of Miss Granger, who then proceeded to reach up, grab his face and kiss him more thoroughly than the Headmaster had ever had the pleasure of receiving himself in all his many decades.

Of course, several years later, when Albus allowed the Weasley twins to ply him with one sherry too many at the Christening party for Hermione and Severus' first child, and consequently boast that he had known all along that something was afoot between them long before they themselves confessed, not one single person in the room would believe him.

After all, no one would ever have been able to sit on that little secret for so long.