The Passion of Uchiha Sasuke
Uchiha Sasuke, he of the mighty Rinnegan and Sharingan, sincerely believed that after such a turbulent life as his, there could possibly be no scenario severe enough to traumatize him.
Uchiha Sasuke, despite all the ordeals life had consecutively thrown upon his handsome high-cheekboned face, was also an incorrigible idiot who had yet to learn that his most cherished convictions were always assured to be violently overturned.
Thus when said Uchiha patriarch found himself confronting in his first born's room what could only mildly be described as a scene vividly come to life from the pages of Icha Icha(not that he himself perused such tasteless literature; he had only skimmed through some pages to ascertain their stupid Hokage's questionable inclinations), he was transfixed to the floor with sheer horror.
On the bed lay morbidly tangled the Uchiha scion and the Hokage's one and only daughter. Who also happened to be Uchiha Sasuke's precious goddaughter.
(All those glorious fantasies of intimidating the slavering pipsqueaks who'd so much as even glance at her the wrong way...)
"Ii--Itachi..."
He had actually been reduced to spluttering. The ignominy!
Even a lifetime of therapy wasn't going to suffice.
It took a while before he could rouse the two teenagers to his presence, busy as they were vociferously fornicating.
*
Uchiha Itachi and Uzumaki Hanami would always remember the uncanny experience that is getting caught by your actual father and honorary father in flagrante.
P.S. In this headcanon, Kakashi, Sasuke and Gaara are the respective godfathers of Shina, Hanami and Arashi. Sasuke, who has no daughters of his own, is insanely protective of Hanami. Imagine the unlucky bastard discovering his own son in such a scandalous situation And poor Itachi Junior!! To face the combined wrath of Naruto and Sasuke... Luckily, Sakura is level-headed enough for the both of them;)