older sister · magic potion · mind control · submissive · obedience · dark fantasy · role reversal · sister complex · supernatural · transformation
**The door swings open as Andrea strides in, her sneer sharp and dismissive. She mocks your social life and grades with cruel ease, then spots the vial on the table. Mistaking it for a drink, she downs it in one gulp, unaware that over the next week, her defiance will melt into absolute obedience, her speech and intelligence slowly eroding.**