Hit her round the head with a cricket bat.
Inheritance shared from your parents will be n - 1.
When you get released from prison, you can spend her share on a new bike.
Before you do this, ask her a question.
"What does it feel like to be hit by a car when the driver drives off the road because she's texting?"
When she answers "I don't know", hit her across the kneecaps with the cricket bat. Then finish her off after saying to her,
"It hurts more than that."