DNA test reveals Scott Disick IS the father of Kourtney Kardashian's son Mason

'Please take this final request for a DNA test seriously,' he wrote before taking on a more stern tone: 'Because if you don't, I will be forced to take legal action and sue.'

The 33-year-old reality TV star was asked by model Michael Girgenti to allow Mason, three, to undergo the test, after he claimed they slept together while she and Scott, 30, were on a break in their relationship in March 2009.

But lab results from tests taken on August 12 have proved his allegations are false dismissing a male model's claims of paternity. 

Kourtney, who has always denied Michael's allegations, told E! News: 'After three-and-a-half years of lies being spread by an individual I met briefly at a photo shoot, I am setting the record straight that Scott is Mason's father.  

                                                      

'While it saddens me to have to address these ridiculous lies - especially when the truth was never in doubt - this story must be put to rest.'

However, Mr Girgenti appeared to not have accepted the results of the text as conclusive and plans to press ahead with the paternity lawsuit he filed earlier this month in which he claims he had 'unprotected vaginal sex' with Kourtney in March 2009 at his Glendale, California apartment.

'We don’t trust the results and believe it could have been fixed,' his spokesperson told Radar. 'Still going to court to fight for court ordered results.'

According to RadarOnline the letter, dated April 23, stated that the 26-year-old male

model wished to avoid dragging Kourtney and her partner Scott to court.

                                   

'My attentions [sic] are not to hurt the family you've created with Scott,' Girgenti wrote.

'Please take this final request for a DNA test seriously,' he wrote before taking on a more stern tone: 'Because if you don't, I will be forced to take legal action and sue.'