At the Birthday Party, My Sister Brought Abortion Tonic

Prologue: On the day of my birthday party, my sister brought me a gift. "Sis, ever since you found your way back to the family, you've taken such good care of me. Thank you." Looking at that bowl of clear, glistening tonic, my eyes stung a little. "We're real sisters. I don't need any tonic, so drink it yourself." My sister rolled her eyes right there and said something that left me stunned: