Aww bless you, my mum died of lung cancer years ago and now my dad is going through it! It's just awful watching them deteriorate, I remember my mum couldn't even get herself to the toilet , I watched my step dad carry her there, I just wanted to cry all the time but she used to like me massaging her hand or doing her nails it also gave us time together, maybe you could do something similar with your mum it's so hard watching them suffer, but if u could do something together that helps it will help u both. 

Im going through it with my dad now , he's just been through chemo but he's not too good, I don't know if it's the chemo that's caused him to be so unwell or whether it's the cancer progressing. They keep giving him more and more painkillers and anti sickness tablets but nothing seems to be working It's so hard isn't it xx

Thank you for taken time in answering my post its so good to talk to someone who going though same thing yes you so right it's really hard I be seeing my mother later I just want to spend much as time as possible with her only thing that gives that little spark back is my baby who 9 months he keeps her on her toes it's hard to believe amount people who going though this you don't realize this until you come on wonderful site like this hope you be ok take care xx