Is this youtube video real??
I wouldn't force the issue of wearing a diaper/nappy to bed. I would ask her and tell her that many kids into their teens wet the bed and wear diapers. I wet the bed past the age of 15 and wore a diaper to bed every night. It's all how you address the situation. Tell her that diapers are not for babies, they are for persons that have a need for protection at night and you would like for her to wear a diaper to bed to protect the bedding and its better for her to wake up in a wet diaper than wet pajamas.
A Club (beating), a wooden spear (stab), a rope or cord (strangling), a glass bottle (Use as club or smash and slash), a cloth (for suffocating),poison, Rubber sheet (suffocating).
There are plastic firearms available now.