A woman, while at the funeral of her own mother, met a guy whom she did not know.

She thought this guy was amazing. She believed him to be her dream guy so much, that she fell in love with him right there

but never asked for his number and could not find him. A few days later she killed her sister.

Question: What is her motive for killing her sister?

don't cheat by googling the answer

I know this one so I won't answer.

She didn't like her and the guy is irrelevant? Maybe she killed her mom too...

I've heard this one before - so, like webpenguin I'll refrain from answering.

think harder Richie

but I'm at work and they frown on that here

lol

Ok

She was hoping the guy would appear at the funeral again.

of course

lol

HA! Nice riddle.

Most psychopath's got the answer right.. scary huh