Either she is a super open to suggestion, making her very easy to hypnotize, or that is one heck of a hypnotist. Either way this is a marvelous scene with little nods to real world hypnotism such as her fluttering eyelids and an emphasis on soothing voice and the way she inputs the suggestion not as a I order you to believe but instead of an explanation that will be absorbed into her mind and be taken and seen as an absolute fact in her eyes.