Daphne (The Shape Shifter)
From Tardis Wiki, the free Doctor Who reference
Daphne was the wife of a clerk who worked in an office. She suspected him of having an affair and hired Frobisher to investigate. He took on the form of a telephone on the clerk's desk and eavesdropped as the clerk called Daphne to tell her that he would be working late again. After hanging up, he and his mistress went out to forget "the old bat" and have a good time. (COMIC: The Shape Shifter)