<human>: Can you condense the text into three sentences or less?

I was told this week that my mother has terminal cancer. She has six months to a year to live. She is still young and I can't imagine life without her.  She is going to need to care at home but my (also loving) father is a functioning alcoholic. I have siblings that can help but they don't all live nearby.

I divorced my husband last year. I have an 11 year old son, who asked me angrily last night why I didn't try harder with his father. My ex was emotionally manipulative. Only my counsellor knows the real reasons why we are divorced. 

I've moved to a nearby town since the divorce. We don't know anybody here yet. My ex stayed in our old home which is in the countryside and has his mother living with him. She minds my son often but was one of the causes of our divorce, as she undermined me constantly as a parent. 

I am worried that my ex is going to try for greater custody of my son. He has already hinted at this. My son likes playing with his cousin in our old house and told me he doesn't like it in my new house because he knows nobody here (yet). He's getting to the socially awkward stage but is usually a good mixer. We have had a strong bond up to this point. 

How will I manage keeping the bond with my son while spending precious time with my mum? I can't eat or sleep with worry.
<bot>: My mother has terminal cancer and needs to be minded. My son isn't adjusting to our new life and wants to be back in his old home. How do I choose between spending time with them both?