Woofgang, I agree, the question is admittedly a bit hazy.
Tamaris, I'm hoping that your history with your own mother/ daughter relationship will not effect the understanding and support you show your friend on this matter.
If a persons relationship is difficult and not close with a family member, they will most likely be less affected by them passing, than say a person who absolutely adores their family member. Does that say it all? I hope it answers your question.