The intimacy between them is just the sweetest, loveliest, cutest thing ever. And you even managed to put a smile on my face when you made this about more than bestiality/Animagus/Squid sex, with this lovely sentiment:
"I knew it was you," said Snape.
And I absolutely love the promise of snarry continuing, a la here:
"So, if I wanted sexual relations with you in this form?" "All you'd have to do is ask."