With Only One Antidote, How Do I Choose Between Them?

There are two poisoned people in front of me.

One is my senior sister, who took me into the sect when I was young and always treated me well. She once endured the censure of the entire sect for my sake, willingly bearing the stern gaze of our Grandmaster. Though she has never let up on her strictness, after all these years together, affection still flows unabated in her eyes.

The other is the current Holy Maiden of the demonic path, the Taoist priest's own daughter. When she was a child and wandering the streets, she once huddled with me for warmth. When we met again, the sound of her name made the world tremble, but in my arms she was as docile as a kitten. For my sake, she retired from the world overnight, even willing to abandon the entire demonic sect.

And I clutch the jade vial containing the antidote, my body trembling.

No one knows that I was the one who brewed this poison.