TRISTAN Thompson is demanding his most recent "mistress" Sydney Chase show "proof" of his infidelity to Khloe Kardashian but she's refusing.
The model recently claimed he cheated on Khloe Kardashian after their reconciliation. Through his lawyer, Thompson has denied the allegations.
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In the letter, obtained by TMZ, Tristan's lawyer claimed Sydney, 23, is refusing to prove the existence of the alleged texts and it can only lead to one "inescapable conclusion … that they do not exist."
He also further claimed that the model keeps "changing the purported 'facts' to fit [her] story."
He continued to claim that the model is making false claims about the basketball player to get her 15 minutes of fame and is demanding she stop defaming him, as she is risking getting sued.
Sydney has acknowledged that she "received the cease & desist hours after I made my post online."
She continued saying on Instagram stories: "It was first sent to an email I no longer use. However, I’m moving forward with the truth & am choosing not to comply.
"I will not be called a liar."
Sydney claimed on a podcast she had a sexual relationship with Tristan, who allegedly lied about being single.
Earlier this week, The Sun reported Sydney denied reports the NBA star is suing her following her cheating allegations.
The Boston Celtics player reportedly called the 23-year-old a “liar" for alleging a months-long sexual relationship while he was dating the KUWTK star.
Tristan and Khloe also share a three-year-old daughter, True, and are also considering having another child together.
According to TMZ, the athlete’s attorney, Marty, fired off a cease and desist letter to Sydney.
"Mr. Thompson had no relationship with you whatsoever and he never sent you any such texts,” the outlet claimed the letter reads.
He blasts her further, adding: "It is obvious that you are a liar.”
The letter reportedly concluded threatening if she doesn't stop "defaming" Tristan online, she will "do so at your peril since you may find yourself in court attempting to defend your indefensible misconduct.”
On Monday Sydney confirmed to The Sun that Khloe, 36, reached out to her for a “long talk.”
“They had an in depth chat about everything but Khloe asked Sydney to keep the conversation private so she's honoring that by not revealing further details for now,” an insider said.
Sydney provided The Sun with an Instagram exchange she had with Khloe.
Reps for both Tristan and Khloe did not respond to The Sun’s request for comment.
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