And pictures have emerged of Scott Disick which appear to be just after he learned of the paternity results.
Scott Disick, 30, looks relieved as he keeps his head down while leaving a Los Angeles hospital, with Kourtney Kardashian, 34, and Mason following behind him.
Kourtney Kardashian was asked by model Michael Girgenti to allow Mason to undergo the test, after he claimed they slept together while she and Scott Disick were on a break from their relationship in March 2009.
But lab results from tests conducted on August 12 have proved his allegations are false.
As they left the hospital on Thursday, Kourtney Kardashian also appeared to be relieved, looking more relaxed than she has done in recent days as she walked along hand-in-hand with her little boy.
As she confirmed the paternity results on Thursday, Kourtney Kardashian 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, Michael 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.
“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.”
Michael Girgenti had claimed that he fathered Kourtney Kardashian’s son Mason amid a steamy love affair.
But before taking the case to court, he reportedly wrote an impassioned letter to Kourtney Kardashian urging her to submit to a DNA test.
According to RadarOnline the letter, dated April 23, stated that the 26-year-old male model wished to avoid dragging Kourtney Kardashian and her partner Scott Disick to court.
“My attentions [sic] are not to hurt the family you’ve created with Scott,” Michael 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.”
He continued: “I assure you I don’t take being a father lightly. I will be a great father to Mason.”
Last week, Michael Girgenti filed paperwork at a Los Angeles County Superior Court in a bid to get joint custody of Mason.
The lawsuit documents the alleged relationship between Kourtney Kardashian and Michael Girgenti, which he claims heated up in August 2008, and continued with months of texting in which she told him her relationship with Scott Disick was “on the outs” and “she wanted to hang”.
According to gossip website TMZ.com, Michael Girgenti wanted the judge to order DNA tests for Kourtney Kardashian, Mason and Scott Disick.
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