Help my nephews and niece please.

My sister, Carrie, is fighting metastatic colon cancer. It has also attacked her lungs and liver.  She is currently on several chemo medicines. Carrie has three children, one of which is expecting her first in July. Carrie has a loving husband who is working multiple jobs. Even with the jobs and insurance it still doesn't cover all the costs. Carrie has to have her abdomen drained every week due to fluid buildup. My sister is a fighter and having financial stress doesn't help. Please help in anyway you can. One dollar goes a lot farther than you think. Thank you so much.