Board Thread:General Discussion/@comment-6302057-20141203042730/@comment-5370037-20150105103308

Onceuponatimeuser97 wrote: Actually, Cora did not know anything about a Curse when Hook came to kill her, however, she understand the Curse's effects (probably due to learning magic many many years ago). However, she spend a lot of time in Wonderland trying to get out. She even used the Mad Hatter to make another hat for her, which failed

Okay, that makes sense except she knew that they would be frozen for 28 years until the Saviour would break the Curse. And it seemed like only Rumple knew about that. That's why Snow and Charming sought Rumple, for advice about the Curse in the Pilot and Rumple using his foresight told them that their child would be the Saviour and break it on her...28th birthday.