I find your statement "i haven't told Mum about the six months yet" quite astounding really.Your Mum is a relatively young woman,and i presume in control of all her facultys,so why are you being given information about her that she is unaware of?

As a woman of a similar age i am not sure i would appreciate either of my children making decisions on my behalf,without even consulting me,let alone discussing the plans they had with other people.
My personal opinion is that the only person you should be speaking to is your Mother,who may appreciate a little honesty,and i am sure will have her own wishes about her future.

The thought of losing a parent at such a young age is devastating i know,i lost my own Father at the age of 51,but you can't let your feelings over rule her rights to make her own choices,and whatever they are you must respect them,even if they are not what you would wish.

I hope you dont think i am being harsh,i just feel like someone needs to point out your mums possible point of view,and also to say you could be treading on dangerous ground if she finds out from another source.

good luck liz