It's not unusual for Dutch patients with dementia to request euthanasia, but in the later stages of the disease they may be incapable of reconfirming their consent - one doctor is currently facing prosecution in such a case. But fear of being refused is pushing some to ask to die earlier than they would have liked.
Annie Zwijnenberg was never in any doubt.
"The neurologist said: 'I'm sorry, but there's no way we can mistake this - its Alzheimer's," says Anneke Soute-Zwijnenberg, describing the moment her mother was first diagnosed.
"And she said: 'OK, then I know what I want.'"
Anneke's brother Frank chips in: "Maybe she hesitated for five seconds, and said: 'Now I know what to do.'"
They both knew she was referring to euthanasia.
You could say Annie's story is a textbook case of how euthanasia is supposed to happen in the Netherlands - with very consistent and clear consent. But there are other cases where the patient's consent is less consistent, and at the final moment, less clear.