I have a friend who isn't always truthful and has made up lies before. 6 years ago she told me she has a brain tumour and it would not be able to be treated. Is it true she can still drive if she does have this? 

I have been honest and told her the things she says doesn't add up. She apparently goes for treatment on her own she drives herself etc. 

I just don't like the thought she is lying as I lost my sister to cancer last year