My sister has been diagnosed with Peritoneal Cancer

My sister Shirley (nicknamed "SHY") was diagnosed with Peritoneal Cancer on December 2, 2008.  As a family - we feel like we are walking in a nightmare.  This came out of nowhere.  Here stomach began to swell with fluid - went to her doctor and form there it has all been downhill.  She has taken her second bout of chemo - has another treatment scheduled for January 20th, 2009 - then her surgeon plans surgery after the third treatment.  From her initial tests there does not seem to be cancer affecting her liver or spleen - but understand that we won't know exactly what we are dealing with until after the surgery.  I fear the open surgery - but we are told this is the best treatment.  She will have three additional treatments of chemo after the surgery.  I/we just need support - don't understand this type of cancer. My sister had a complete hysterectomy and has no ovaries/ uterus etc.  The doctor says the cancer cells are in the lining of her stomach - My sister did work in a chemical plant environment when she was in her 30's.  She just turned 60 years old.  I don't know the questions to ask - just need any information anyone can give - or who has been through this or is going through this.  We want to do all we can for our sister.  I continue to read and research - sometimes I am overwhelmed.  Are we following the right procedures - chemo - surgery - then chemo?  Thanks for the opportunity to just connect with someone who knows what PPC is.  Prayers is what substains my family!