Mildred

 is a tour guide at the House of the Seven Gables in Salem, Massachusetts.

During a tour of the museum, Samantha chastises an antique bedwarmer for following her around. Mildred opens the door to bring in the next tour group and sees Samantha talking to the bedwarmer. She is shocked and Samantha tells her, "I used to have one just like it at the rest home."

Just before the tour is over, the bedwarmer levitates into the backseat of Darrin and Samantha's car. Just after the Stephenses leave the house and drive away, Mildred rushes up to Miss Ferndale, another tour guide, and tells her the bedwarmer is missing. She thinks Samantha took it and Miss Ferndale agrees as she memorizes the license plate number.

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See also The House of the Seven Gables