Prayers for your sister and your entire family. Please tell her we are all thinking of her!
I realize how scary this news is- my wife has brain cancer as well, diagnosed 2 years ago. Do they have any idea regarding what grade it is yet? I.e, level 1-4. There are a variety of treatment options out there, depending on tumor location.
So sorry to hear this- God bless you and bring you strength.
Prayers for your wife too.