Can I abandon my crippled mother in law?
Are you joking? Why do you want to abandon your crippled mother in law?
I am stressed and overwhelmed at caring for her.
It is wrong to abandon disabled people. If you are stressed out it is good to take a break or get professional help for a while.
I don't know how to take care of her and besides she is a bitch which makes it more difficult.
It is hard to take care of a family member who is disabled and especially if they have a bad attitude so I can understand why you are struggling. Go for some professional help so that you don't have to do it.