Khloe Kardashian is reportedly back with her cheating ex Tristan Thompson, but are dating in secret according to a new report.

"Khloe and Tristan are 100 percent back together," an insider told Radar Online.

On the current season of Keeping Up With The Kardashians, Khloe has been rejecting all of Tristan's advances and vowed never to go back to him again.

But it's all been for show.

"He spends the night there frequently when he is in town," the source continued, adding, "It's a secret because she knows how much everyone would judge her."

Khloe has been tough on Jordyn Woods, who was ex-communicated from the Kardashian clan after she admitted to kissing Tristan, but if she's forgiven Tristan, why has the olive branch also not been extended to Jordyn?

"She's hiding it from the public, but her family knows all about it," the source spilled.