Prosecutor said Stephen Hailes, 48, had entered into an Internet-based romance with Karen Parker, 36, a married mother of two, and became jealous after he hacked into her e-mail account and saw she had been flirting with other men, The Daily Mail reported Wednesday.
Hailes forwarded naked pictures Parker had sent him to everyone in her address book.
"She learned of his action when her friends contacted her and asked her why she had sent them naked photographs of herself," prosecutor Sharon Jomaa told Cheltenham Magistrates' Court. "In police interview the defendant said that he wanted her husband to realize what sort of woman his wife was."
Hailes has pleaded guilty to indecent and grossly offensive images by public communication network, and prosecutors said he could face jail time. He is scheduled for sentencing March 19.