I know you can die by failing rolls to stop Astarion from draining you. However, the game also provides two options that amount to “let him keep going” that also result in your character’s death.

I really do think the game could distinguish a bit between these two paths. Since in one you really are letting him kill you, so being indignant about it is a little hypocritical. “Really, darling? You seemed perfectly happy to die in my arms last night. Funny how I don’t remember you asking me to stop.”