The 44-year-old woman, whose case is reported by researchers from the University of Toledo in the latest edition of medical journal Sleep Medicine, had gone to bed at around 10pm, but got up two hours later and walked to the next room.
She then turned on the computer, connected to the internet, and logged on by typing her username and password to her email account. She then composed and sent three emails.
One read: "Come tomorrow and sort this hell hole out. Dinner and drinks, 4.pm,. Bring wine and caviar only." Another said simply, "What the……."
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