Rock and a hard place

An ordinary Friday, took mum shopping, did some for us. Went for a walk after lunch, caught up with some online business. 
Everything changed after that. 
My sister's husband called to say she died this morning, she had breast cancer and I never knew. She disengaged herself from our family 30 years ago for reasons none of us understood and she felt no urge to explain. I tried repeatedly to mend things but she wouldn't, no there is no chance.
There's a butterfly in extras