In a lie detector interview for Vanity Fair with her sister Kourtney, Khloé Kardashian was asked if she’s “still sleeping” with her ex-boyfriend Tristan Thompson.

“Are you sleeping with Tristan?” Kourtney asked her sister near the end of her portion of the interview. “No, I am not,” she responded. “I’m really not.” The polygraph examiner confirmed that she was telling the truth, to which Kourtney congratulated her sister, “Bravo!” Khloé added that if it showed she was lying, even though she’s adamant she’s not, she “would die.”

Elsewhere in the interview, Khloé asked Kourtney if she regretted not inviting her family to their impromptu wedding ceremony in Las Vegas earlier this year. “I do not,” she replied, to which the examiner confirmed she was being truthful. She also spoke about when she was caught having sex with her husband Travis Barker in public, and Khloé asked her if she regretted that. “Nope,” she said, to which Khloé responded, “Good for you.”

In an episode of Hulu’s The Kardashians earlier this year, Khloé revealed that she turned down a marriage proposal from Tristan. “The fact that he proposed and you never told us,” said Kim in an episode. “And I asked him months later… the night after I thought it happened and he’s like, ‘Oh I did it months ago, she didn’t tell you guys?” Prior to the proposal, Tristan and Khloé were the subject of a public cheating scandal, and the NBA star later admitted he was unfaithful during their relationship. He apologized and has since had a child with another woman, whom he pays $9,500 in child support to every month.

Watch the lie detector test interview above.