Saying she was *very much considering* what decision to make? Actually just robs Edith of any actual victim status, since it means she was "seriously" considering letting Bertie and Marigold live a lie for as long as she could stand it. And the dark truth is I think she would have actually gone down that road, because…

Mary was categorically an asshole, but in all honesty I was so annoyed at Edith swanning about all episode "whatever shall I dooooo" that I was grimly satisfied when Mary sank her battleship. If Edith had shown some guts for once in her life, she could have prevented the whole thing.