This incident would certainly have given her cause to abandon Jefferson in another land, separating him from the one he loves. It’d also explain why she cursed him to remember the love he’d lost.
I’d think she’d hate Rumple more if she knew the whole story though. Granted, they’re not BFFs, but she’s still happy to work with him, which I doubt she would be if she knew the whole truth. Unless she did know, but kept that fact hidden, so she could play him, (or so she thought), pretend to still be good natured frenemies, just enough to get him to give her the curse, and in casting it, she not only got revenge on Snow, but also on Rumple.
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