No.
There is no way of knowing that this is not actually murder.
Once being suffocated she had no way of indicating she changed her mind.
“Assisted suicide” laws are covers for murderers.
They are incentives to suicide.
And if they involve others they destroy others.
Unless you are completely paralyzed you are able to look yourself without “help” in any number of ways. You DO NOT need assistance and should not be allowed to have it.
Interesting he did not choose a kinder way to kill her. An overdose, care in monoxide, shooting her in the head. No. He had to smother her.
That was my thought, too. I can almost imagine circumstances that would justify something like this but to do it by suffocation sounds grusome. She must have struggled - even if you think you want to die the reflex to breathe can't be overcome.