If a person is deprived of REM one night, the next night they experience longer periods of REM to make up for the loss. And wouldn't the curse persist until Vicky finally dreamt it? In the meantime she would be suffering detrimental mental and physical effects of the lack of REM sleep and disrupted sleep. So if the dream itself didn't get her, the lack of dreaming would!
As for the earplugs, you know how the "fine print" of these spells work: the dreamer would have no rest until the recipient actually heard the dream
The best solution is the Hoffman way: give them a sedative!