Is she going to die?

my exes mother had a stroke and a vessel in brain burst at the same time yesterday and they have her on a ventilator and say they have got her blood pressure back up from the critical point it was at yesterday. the doctors also found that she has gull stones and kidney stones.they say that there is some blood around the brain but she isnt bleeding from the burst anymore. i was told this morning that her pupals are fixed and dialated and arent reponding to light at all. she just in a coma right now. so what are her chances? i mean they said that more than likely there is damage to the brain cuz it went without oxygen for about 12 minutes. i am so scared tht we are going to lose her. when your pupals are fixed and dialated is there no coming back? does that mean the beging of the end?