My Junior Sister Refines a Pill, So Why Are the Senior Brothers Rebelling?

Reborn as a doomed cannon-fodder character in the cultivation world, I was about to be sacrificed as a murderer from the start. Luckily, the Divine Alchemy System bonded with me just in time! Feed a pill to a powerful cultivator, and I can copy their strongest ability! To stay alive, I became the sect’s head caretaker. But... System, explain to me what these side effects are supposed to be! I gave a pill to my aloof senior brother. After he broke through, he announced in front of everyone that he would marry no one but me. I gave one to my hot-tempered second senior brother. After he broke through, he dropped to his knees before me. My taciturn fourth senior brother ate the pill I’d prepared for our master, then begged to be my shield. Even my ascetic master begged me to give him a pill. The way he looks at me is getting more and more suspicious! With my next target being the Demon Lord, a legendary killer who never blinks, my hand trembled as I held the pill. I really can’t even! I just want to lie low and level up without a fuss. Why does every one of you think I’m madly in love with you?