My mom died of this 8 years ago at age 56. She was a smoker. My dad's second wife (didn't know her well) died of this 2 years ago around the same age. She did not smoke, but was a hair dresser and allowed smoking in her salon.
From what I know personally and understand.
Most lung cancers are not detected until about stage 4, unless a person has a lung xray....and no one usually has this done. So lung cancer seems to spring out of no where when symptoms show up. It can take a person 10 years to get to that stage.
Mom was losing weight and couldn't breathe. She went to her regular doctor and he was dismissive. My SIL got crappy with the dr. and told him to look again. He listened to her lungs and said she should go in to have an xray. When Mom asked when, he said NOW. They drained a gallon out. She was hospitalized that night. That was mid June. She stayed in the hospital for a week while they tested her and diagnosed her. She went home on hospice (meaning they expected her to die within 6 months). They tried Chemo for her, but that almost killed her right then. She did have radiation for pain management. She soon was on oxygen 24/7. We had a hospice nurse come regulary. (I moved home to be her caregiver.) She ended up on a morphine pump for pain management. Mom needed more and more morphine for pain, but also fought back not wanting to be out of it. She often stayed in pain so she could mentally function. She died almost 4 months to the day later.
I would guess your friend is at stage 4. I would guess that they are still trying to decide what level of treatment is best for her. Once you hear the mention of hospice, then you know it's probably very soon (6 months or less).
I would like to feel that I was a comfort to my mom about all of this because I allowed her to make plans and not dismiss or be in denial of what was happening. In a way, it was my coping mechanism. Her death didn't hit me until about a month after....when I didn't have so many things to tend to. Be a friend through all of this. If she talks about her death, let her. Don't hush her up. If she talks about how she wants things after she is gone, listen and take notes. Many people go through denial and can't handle listening to someone make their plans. Be that resource if you need to be.
If she hasn't already done so, record her memories of her children's births and stories of their personalities. I don't have anyone to tell me what I was like as a baby or how my mom enjoyed her pregnancy with me.
I pray for you and this woman, and her family. Feel free to PM me if you need support. It is a very hard road.