Why does my mother, with metastatic cancer, experience fever and frequent bowel movements?

Hi doctor,

My mother suffered from breast cancer a few years ago. It was treated and then in two years, she suffered from metastasis in the whole body. Now the problem is that my mother's cancer has spread to the brain but it stopped there and she suffered from ataxia.

Then the disease in the liver increased and she suffered from hepatic encephalopathy on the second and recovered in three days. Then she was doing fine, even talking. I am attaching the reports.

But now for about four days, she had a light fever and for the last two days, she has had lots of dry coughs. Today she started with irrelevant talking. She is passing stools two to three times a day but we have half-packed lactitol for the past two days.