Should I Pursue Chemo for Aggressive Breast Cancer Spread?

Keeley Mums cancer has spread too far and has been deemed too aggressive for surgery. It started off in the breast and has spread to her brain, throat, lungs, liver and now also into her lymph nodes... She has been referred to oncology, who will look at her case and decide whether she is a fit for chemotherapy, and once they meet her they will decide if she is strong enough to go through it. IF mum is able to have the chemo, she will either be given a course of tablets to take, I believe they are one tablet a week. Or she will be given chemo via an IV and will have to go to once every three weeks for a few hours. If mum decides not to have chemo she will be referred to palliative care