My mom was just diagnosed after FOURTEEN years - Metastasis

Can anyone help me out here?

My mom fought Stage III B breast cancer in 2007 and has been in remission/cancer free (not sure of terms to use to be honest..) since 2009. She has taken a medicine since then to help recurrence - but it came back. She was HER2 + at the time T2 I believe. I cannot recall to be honest. It was in 8 lymph nodes.

But we went to the ER due to vomiting and insane pain that hit out of no where one night - on the opposite side of the liver. Note, she has yearly updates with her oncologist and had just had it in March and there was nothing to alarm them at all. Nothing. Fast Forward to June 13 and they find "innumerable" lesions on her LIVER. No swelling, no pain on that side - but now that I think of things it would add up as she experienced nausea for a few months, back pain and this was all thrown off to a recent finding of her left renal artery having blockage. We were shocked. After the findings they did a MRI and it confirmed it was indeed "widespread metastatic disease". Her oncologist came to the hospital to give her confirmation. We are now waiting on a biopsy and due to scheduling conflicts it is not until June 29.

I guess I just need to know if anyone has any insight on this recurring in the liver - she is 75 but in GREAT shape. I mean she has had more energy that I do in my 40s!! She is sassy and you can imagine this has crushed her spirit. I feel she feels there is no use for chemo and just to hear what they plan after the biopsy. Note she was told by the oncologist and due to "tumor marker" labs that it was indeed recurrent breast cancer that had spread. She has swollen lymph nodes in other areas by the liver as well.

I am not sure what I am even looking for - I guess any insight or if anyone else had recurrent in the liver at this age - or family members who had and how they did with treatments and how things are going with it? Again, I understand she is 75, but this was out of no where. I mean so much blood work done between her rental artery findings and labs at her oncologist - they were clearly surprised at what they found.

I just need someone to be honest with me as I went through this with my dad and they told him one thing but gave my mom the real news of his prognosis. He lived 6 months after finding out about his lung cancer that had spread to wow...everywhere. They told us it would be easier to say where it was not. So with her fighting her battle in 2007 and my dads cancer fight, I have watched both parents have different outcomes.

Any insight would help. Thanks all. I hope this is the right place for this.