Were the family insensitive to Edith?

So everyone pretty much knew Gregson was dead, and they moved on. I was having a conversation where someone said the family were really insensitive to Edith who'd gone into full mourning and everyone else just carried on. The scene where Mary gets a new haircut comes to mind, where Edith just sits miserable in the corner.

Should the family have been more sensitive to Edith or was she expecting too much for someone she was never officially engaged to?