"A strikingly beautiful young woman is attending her mother's funeral. While there, she meets a man whom she previously did not know. He is tall, handsome, and intelligent and the young woman falls instantly in love with him. Two days later the woman murders her sister. Why?"
"She only wanted to see the young man again, assuming he would show up at her own sister's funeral."
I didn't get the answer correct and in fact was nowhere near resolving it and once I found out that t