Is this the end of my marriage?

[P17]

P17,
Forgive me for coming in very late on the thread but am I to understand that you have no hope of ever getting your M back? It seems all too new and fresh for me. I think you have a good chance of saving your M.

The current sitch is as follows.

My mum doesn't have long to live. I went NC last Thursday but W came around on Monday and I had to reiterate the NC letter to her. Since then the IM has asked my W twice if she wants to see my mum (she doesn't have to go down with me). There has been no response. IM thinks she is not going to reply to her and I should text her myself.

I actually don't think that I could go back with my W after such cold, callous and unfeeling concern / attitude towards my mum. That is really breaking me up.

I am actually contemplating texting W myself to ensure she is getting the texts (as I get a delivery receipt) but that would break my NC. However I am wavering between what is more important, the NC or my mum. If it is just something stupid as to why shes not replied, I am also killing my M.

Before this I would have waited for the A to break. Now she is destroying any feelings I actually still have for her and my feelings are turning to hatred and anger.

I am in the anger stage of grief. And it's not nice.