A girl, at the funeral of her mother, met a guy whom she did not know. She fell for him and just kept looking at him. Sometime later, she realized that the guy had gone and she forgot to take the number of the guy and now she couldn’t find him. A few days later, she killed her elder brother.
Question: What is her motive in killing her brother?

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