Oesophagus time line?

Hi could anybody give me some advice, my aunts has recently been diagnosed with oesophagus cancer that's has spread to her nodes and lungs. It's stage 4b also inoperable as the mass is so big. They have now also said she is not a suitable candidate for a stent we're waiting to see if they will go ahead with any other treatments but it feels every thing is takingn so long for answers.  Can any one give me a realistic opinion on how long she might have??? We are already preparing for the worst.