Multiple Sclerosis (m.s)?

Hi. My father inlaw has M.S. i just want to be a little more supportive & understand it better so doing some research. i think it has gotten worse lately, It is beginning to effect his work & becoming a strain on the family as my partners mother is in fear of loosing her home due to drop of work & not being able to keep up with the mortgage. Also she is ob worried for her husband. They were looking into chemotherapy to help slow & stop the condition from deterioratingg & i thought this was a really good idea. He was not a suitable candidate for it in the end though due to his heart not being up for it at this time but think he will be looked at it again in the future. He does not really talk about it & i just wanted to understand it a little better to be able to help. Thankyou.