A Puzzle

The past few days I’ve been playing techie at home and at my mom’s office. I found out that our Tivo will not work with our new VOIP. This forced me to network the Tivo with our computers and internet. Since all four of our wired connections are full, I was forced to consider wireless, which I have heretofore resisted. But the Warden needs her Tivo!!! I had no choice.

Long story short I finally got that up and running and working properly so Gilmore Girls can once again be recorded on HER Tivo everyday. On my mission, as I was poking around in different shared network files, I found an old Microsoft Word document entitled “sister killer.” I was intrigued.

I opened the file and remembered this great puzzle to which I once knew the answer. But now I cannot remember the solution. The Warden would probably remember the answer, but that would be too easy for me to simply ask her.

So I’ve decided to post the riddle and see if I can remember the solution before anyone else can come up with it. The race is on.

And here it is:

A woman, while at the funeral of her own mother, met this guy whom she did not know. She thought this guy was amazing, she believed him to be her dream and she fell in love with him right there but did not ask for his number and no matter how hard she tried she could not find him.

A few days later she killed her sister.

Question: What is her motive in killing her sister?