You call that "life"?
You know, I am pro-choice for both birth and death, but right now I wish there was a death penalty for being as incredibly stubborn and stupid as her parents. There won't by any improvement. She's been in vegetative state for 15 years, all the doctors apparently agree that there is no way it will improve. You're waiting for a friggin' miracle.
You're not fighting for her well being. You're fighting because it makes you feel good about yourself and useful. Well let it go and grow up, for fuck's sake.