Of course, there's also an element of unenlightened self-interest making her decisions for her. The logic seems to be:
- If Liz rides around on that awful motorcycle, she is sure to get hurt very badly owing to not being surrounded by metal.
- I will get stuck caring for her and will have noooooo help and noooo time to myself.
As for why she won't get on a bike and see that it isn't guaranteed bloody death, she seems to be thinking:
- If I get on the horrible motorcycle, I'll get horribly injured.
- Since my family is ungrateful, they will either leave me to die or squeal in outrage because I cannot work and work and work while in a body cast.
Simply put, the Pattersons have to endure a lot of insane crap from a wet blanket because said pill fell on her arse on her first and only time skating.