Borntosew What a horrible experience for your daughter in law, and I am so sorry to hear it. No wonder you are angry about it. Quite rightly.
I had much the same when someone I barely knew called round after I had had a mastectomy to tell me her cousin had died of breast cancer. I didn't feel like having visitors in the first place, let alone someone I'd only met twice, but she had made that effort just to be spiteful. Grrr. People eh??
But ... I am still here 20 years later! Radium treatment is exhausting .... add in a 2 year old and totally exhausting. The treatment is hard and I hope with the love and support around her, she can be as positive as possible, perhaps join a self-help group for women with breast cancer. There is nothing like talking with people going through the same thing ... they will understand.
There are many of us survivors, and treatment is much better now than it was 20 years ago.... OldWoman and I are both long-term survivors, even Kylie Minogue is one, and your DiL can be one too.
for her and sending her my very best wishes, and
for you too, Borntosew for being a lovely supportive MiL.