If they saw Mary and Edith's fight in episode 8; say they were watching from the afterlife or something, how do you think they would feel? I think they would be very disappointed in Mary and eager for her to fix things, then sad when she made little effort to do so. I can kind of imagine Matthew watching Mary find out about Marigold and thinking that Mary will show some kindness to Edith as a result, only to see her tell Bertie over the breakfast table. I'm actually rather disappointed that Edith didn't ask Mary how she'd think Matthew and Sybil would feel if they saw her now. But the double Bitch was pretty good as well.