An act of love or an act of murder?

"I asked myself what Tom would want. He wouldn't have wanted to live like this."
Frances Inglis

Words from a mother who injected her brain damaged son with heroin. What are the ethics of this case? How would an absolutist view it? What about a relativist? How do you view it?

http://news.bbc.co.uk/1/hi/england/8459388.stm