Kourtney Kardashian`s `ex` threatens to sue over paternity test for son

London: A model has claimed that he had an affair with Kourtney Kardashian while she was on a break from her partner Scott Disick and wants to get paternity tests done on her son Mason.

Michael Girgenti has alleged that he had a fling with Kourtney after they met on a photo shoot in 2009 and that there is a chance that he is Mason`s father, the Mirror reported. Girgenti wrote a letter to Kourtney demanding that three-year-old Mason has a DNA test. In the letter he has written that if Kourtney doesn`t comply he will take her t the court and sue her for a paternity test. ANI