Geez, LW, take a hint. Friend didn't read any of this writing. She only accepted to be polite, and when asked about it she said "Oh, yes, yes, I read it" in the hopes that LW would change the subject.

If LW wants Friend to know all about Son's battle with cancer, she should just tell her about it. Or maybe not - if LW isn't close enough to this woman to know that she's not interested in reading this writing, maybe she's not close enough for that sort of sharing.