I'm really sorry to hear that bro.
I really wish your mom will get well , but if she has to die then you have to be strong bro, I know how hard it is but you want the best for her as her son , so you will have to agree with that - want it or not , she will not suffer from the pain anymore.
I really wish this will not happen and she will be with you in the upcoming years , but stay strong , you have to be a man !
Try to be the son that she wanted you to be , make her proud .. you will bring the smile back to her face , she will be proud with you !
I'm an Atheist my self , but i'm really sorry to hear that ..
I really really wish your mom will get better and will not suffer from the cancer anymore.
Believe me, even if it looks hard , you just need to believe that everything will be ok and things will be much easier ..
Best wishes to you & your mom bro,
Long life to her ..