So sorry to hear about your mum - all we can do as family and friends is remain positive and offer our support.
Unfortunately i dont know much at this stage about his uncles cancer but they told him the same as what your mum was told, about it being incurable but they may be able to slow it down. I also know its Asbestos related as he's worked in garages. He's only 43 i believe, extremely healthy and youthful, never smoked - so boyfriend found it extremely hard to take as they are very, very close. Obviously its not easy for anyone to take and it just bloody frustrates me to be honest - the fact that when you want to say everything will be alright but feels as though you'd be lying!
This is the post i wrote on Friday after hearing our sad news - many people gave their experiences of cancer, and words of support - might be worth a quick read.
http://www.theanswerbank.co.uk/Body-and-Soul/Q uestion402386.html
Thanks so much for the link, i'll check it out and as time goes on i'm sure my boyfriend and his family may need someone they can go to release emotions and ask questions. xxx