What a shame
I can see why her parents do not want to let her go from just looking at this picture. It's tough saying goodbye to someone for the last time at their funeral. Saying goodbye by the will of your hand gives you the option to do what you want, and perhaps for a short time it would "help" the grieving process.

But if you see where I'm going with this, doing that only makes it worse. The person they were will never be again.

Living up to your modern humane instincts and pulling the plug for someone you know is gone, is perhaps the best way for your "sustained" loved one to go.

The other half of the battle is ACCEPTANCE, in which many of us personally know is the hardest thing to do.