Hi my name is Mona,I’m sorry to hear that, I have been battling Stage 4 Esophagus cancer that spread to Liver. On top of it all I have a benign heart tumor. Just had a feeding tube placed. I have some problems since feeding tube. Trying to get my strength back. From me having the disease myself I can tell you mood swings are horrible for me.Pain for me can be unbearable. I have good days and bad. What kind of cancer does your mom have? What stage? All I can say is be there for her. Try to make as comfortable as possible. I bought a twin adjustable bed and a butt circle floaty, they made me more comfy. Prayers for you and family!