Season 1: EQ taking Graeme’s heart, threatening him by saying that if he does not do exactly what she wants, she will killing him, then having him dragged to her bed chambers.
I think the worst part of it all is lack of in-show and off-show acknowledgement of what this scene really means.
Season 2: Cora throwing Johanna out of the window, Regina complaining to Henry and telling him her plans to take him back to FTL without everyone else, then wiping his memories.
Season 3: any scene with Peter Pan in it haha.
Season 4: Robin Hood saying he is throwing away his moral code to spend the night with her, and in the crypt no less.