Decide weather, really? Really? A comic reference, are you serious? I mean, this is kind of a serious topic so your comment would seem inappropriate, but I appreciate the helpfulness towards language learners. It's just the person making the mistake would not even get the joke if they don't know it's supposed to be spelled 'whether'.
Seems ridiculous anyhow that anyone would seek permission for suicide. If somebody is so dependent, allowing it is obviously grossly negligent. If she doesn't recover, her death is a problem that will eventually solve it self, it just takes patience.