Why IVF for stomach cancer patient on 2 diuretics

I am frustrated. Does the patient condition warrant directing the plan of care or does the family. It is a sad, sad situation, a fairly young woman only diagnosed last month with stomach cancer, only had 1 chemo treatment, had multi organ problems couldn't tolerate any further chemo. Family said on admission they wanted IV fluids, I educated that no, we don't do iv fluids. Well, now family insists (even though patient is on two different diuretics, one of them lasix at 80mg bid), she has terrible ascites with her abdomen measuring 60" (and she is a small lady), also 2+ edema to lower extremities. she has dispepsia controlled with compazine, phenergan, and zofran. I just hate filling this little lady with fluids, I fear it will do her more harm than good. doc said "NS 100/h one 24 hour trail" is appropriate, for now, I suppose. I just fear it will cause her more harm than do her any good. My only other experience of any fluids in the field was a lung cancer patient whose wife insisted he continue TPN at home, he lasted 12 hours before he sounded like he was drowning. Thank you for your input, anyone have any experience with stomach cancer and IV fluids. Thanks