Relative did 6 months of chemo but not in remission

She hasn’t been in touch with anyone for months so I as well as everyone else I found out on FB that she had just finished 6 months of chemo. But she is not in remission. They are running tests to find out what’s next.
What I was told is she had a rare and aggressive form of stomach cancer that spread to her abdomen (isn’t stomach and abdomen the same?). The way they made it sound on FB is that chemo was done so I assumed she was in remission. What is the prognosis for this kind of cancer if she isn’t in remission?