I feel sorry for this lady and her situation and admire your strength and kindness in being there. However, I would like to tell you about a situation that I recently saw happen to someone on my street, and I tell you this only so you can be objective and maybe make some assessments not based on emotion but make sure you have all the facts first, I wouldn't want to see this situation happen to you that happened to the person I know.
A lady on my street, married, kids, was in a lonely marriage and needed some attention and loved the attention she was getting from a male co-worker.....he treated her well, did things for her, etc. She told him she has been diagnosed with cancer also, which in turn caused him to give even more, do more, be there for her more, etc. She continued to accept his kindness, etc. She also told him to not say anything to anyone about the fact that she had cancer. He obliged. To make a long story short, it eventually came out that she did not have cancer at all, and was using the story as a means of getting more help, kindness and caring from the male co-worker.
It's sometimes easy to see why people resort to such extreme's when they're lonely and need attention or when they want to get something from someone...it's not right, but I am not here to judge anyone. I'm just saying maybe you should make sure that what you are being told is the truth and not an exaggeration or fabrication in an effort to use you. Just saying.