Briseis wakes Achilles up with a knife to his throat. In short order, Briseis looses her right to wear a virgin's robes. This is a conversation that might follow their interlude...

"Are you ever afraid?" Briseis' question was spoken across the steel of Achilles' chest as she lay in his arms.
He admitted, "Never of steel, never of men, and not of gods..."
"Of death?" she wondered.
He snorted. Then considered, "...perhaps, of oblivion. Of life that in the end meant nothing but bones that crumble to dust. And of boredom," he added with a grin.
"There are better paths toward immortality than via worldly deeds," she claimed.
Another snort. "How can anything a man does in this life be other than of- this-world?"
"Prayer. Dedication to the will of the Gods."
Achilles considered her words. Finally, he nodded, "But a man in battle is a praying man. The Gods possess us with battle madness. Our minds fill with Ares' intentions, as in prayer. 'Tis nothing of ourselves that prevails when we taste victory. And defeat is the cost for those who do not give themselves to this madness. We fight because when the madness takes us, then we are as Ares. And if we die while possessed, then we dwell with gods for eternity."
"And there is nothing in that to fear?" she wondered.
"Only never to feel as a God. Better to die in it and taste it for eternity."
She shuddered, "In battle for eternity?"
"Na, not battle," he breathed, "...but madness. Passion." He traced the curve of her jaw with his fingers, "The Gods' greatest gift to man." He smiled again, "...and woman."