Sad to hear that , second cancer are always tough to treat . The actual testament and prognosis depends on many factors , including her health , how well she is tolerating the chemo , her metastasis , the type of cancer (based on biopsy ) , it’s grade and the type of chemo therapy that is given . No one can predict exactly the life span or Prognosis but general prognosis can be explained to you based on these factors If you want a second opinion based on her current stage of disease , please attach all Investigation reports and full history