[He--

no, no, he can't give into this--

But if he doesn't drink, he'll drown in it, and he can't let whatever thing has his brother take his life before he can save him.

He tries to hold off on it for a moment, coughs and sputters around the tendril, and then his throat starts to bob steadily with the flow of fluid.

(he doesn't want to think about what he's drinking)

(why it makes his mouth feel so open and pliant and why the tendril starts to feel right there)]