Cathartidae 2.0 translates an item from South Korea’s Sports Hankook’s Erotic Blog recalling another (now broken) world record set by a Singaporean, Ms Anabelle Chong.:

For example, why do porno actors place so much emphasis on the frequency of sex? In Sex: The Annabel Chong Story, a documentary about the famous porno star, we learn that Chong had sex with 251 men at one time. She explained her actions as being consistent with the logic of the woman’s movement. But in reality, it was nothing more than an event designed to attract attention.
For proof, even afterwards, such events went on. A porno star named Houston continued the record-breaking by having sex with 500 men. As a millennium event, one Italian porn star had sex with 2,000 women, though it wasn’t officially recognized as a new record.