A website that connects married men and women for adulterous affairs reportedly received more than 50,000 hits in seven months from computer users at the Houses of Parliament.
The 'traffic' from the heart of Westminster to the Out Of Town Affairs site, which contains explicit photos of wannabe adulterers and allows them to "read and send filthy messages", worked out at 289 hits a day in one of the months, The Mail on Sunday reported.
The newspaper found computers provided exclusively for MPs, peers and their staff were being regularly used to access the site after putting in a Freedom of Information request on web usage at Parliament.
The saucy website, which promises "thousands of horny cheaters ready to get some action", received the highest interest in October, with 8,971 page views generated, narrowly ahead of December, which saw 8,457 hits.
November produced 7,533 hits, August, 5,174, July, 7,493, June, 6,822 and February, 7,925, the newspaper found. It totalled 52,375 clicks across the seven months.
A Parliament spokesman said "more than 5,000 people" enjoyed access to the Parliament computer network, including outside of work hours.
But they will no longer get access to "the encounters site for people seeking exciting changes".
The spokesman confirmed that the Out Of Town Affairs site had now been blocked because it "broke IT rules".