I like the Sublimity detail, Severus brewing something that takes off on a potion we've heard of. The specific effect is cool too.
"Lucius, even at the best of times, Draco was an arrogant little shite. I do not wish the boy any permanent harm, but my life would definitely have been easier if you had paid more attention to his social graces and less to his social standing."
This makes me squee, I dunno why...
It had been many years since they embraced each other, but hands remember, lips remember, and hearts remember. Malfoy and Snape. Lucius and Severus.