Hi, Welcome to Healthcare Magic Forum.
Very unfortunate to hear regarding your mother-in-law.
As per what you have described above, she has a highly-invasive and metastatic tumor
. Metastasis is spread of tumor cells to nearby / distant organs through blood or lymph
. And the setting in of sepsis
along with multi-organ damage is all the more worse. Studies have shown that for such wide spread tumors the average 5 year survival rate
is approx 5%. It is very difficult to accurately tell you her chances of survival over the next 3 months. It is advisable to admit her in a facility that provides palliative care
/ end of life care, as per her oncologists advise.