Hi Bubbles
While I can see that there are a lot of very supportive, helpful people on this site, who will do their very best to answer queries and share their own experiences, I would really strongly recommend that you and MIL ask as many questions as you can think of, of your doctor/consultant. They really are the best people to explain what's happening and why.
I don't know what your medics are like, but I have found my consultant and in particular the specialist nurses more than helpful and supportive and willing to answer all sorts of questions, from purely factual medical stuff to the more personal/emotional things.
Good luck!
Jet