Good evening. I am in a similar situation, with my husband, and I am so sorry about your mum. My husband is 75. I am 52. He was diagnosed with stage 4 lung cancer with brain mets.  He has had radiotherapy on the brain tumour and now has just finished his 2nd cycle of intense chemotherapy. We are due for next cycle on Monday 23rd, but my husband has decided he is too weak and too poorly from side effects that he would rather have his quality of life back for however long we have left together rather than a "possible" month or 2 extra but being so sick along the way. I am finding this all very overwhelming, as it has all happened within 6 months. Off the record we were told 6 months with treatment, I'm just at a loss but trying to be brave for my husband. Feel helpless and lost. X