Yes, the one who lived with her and starred in her show Life of Kylie.
So, it all started when TMZ reported that Tristan, 27, and Jordyn,21, allegedly hooked up. According to onlookers they "were all over each other ... making out."
Khloé reportedly immediately dumped him when she found out.
It is yet to be confirmed by the Kardashians, but Khloé's bestie Malika took to Instagram where she left a pretty telling comment.
"These hoes ain't loyals," she commented on a video of Kylie's daughter Stormi which had the caption: "Stormi in Calabasas waiting for Jordyn to pack her sh*t and get out of Stormi's house".
Maliqa also commented "STRONG FACTS" on another post where somebody explained what went down between Tristan and Jordan.
Larsa Pippen, long-time family friend of Khloé and the Kardashian also wrote, "AMEN!!!"
The news comes as a major shock to Kardashian-Jenner fans, as Jordyn has been close with the family for years.
Her and Kylie regularly take vacations together, with the reality TV star referring to Jordyn as her 'wifey'.
"love these two more than life itself," Kylie recently captioned an Instagram photo featuring Jordyn and her daughter Stormi.
"The whole family is writing Jordyn off," the sources says.