Khloe Kardashian
Khloe Kardashian admits to filming sex tapes with estranged husband Lamar OdomJerod Harris/Getty Images for A E Networks)

Her older sister Kim Kardashian is renowned for her infamous sex tape but Khloe Kardashian has a racy secret of her own. The Keeping Up With The Kardashians star has admitted to filming a sex tape with her ex-husband Lamar Odom, but it is unlikely to ever see the light of day.

In promotion of her new talk show Kocktails With Khloe, the 31-year-old appeared on Andy Cohen's Watch What Happens Live, where a caller asked the reality star if she had ever filmed herself in the bedroom. Khloe revealed: "I've definitely recorded myself having sex with my ex-husband, but not like talking to camera.

Khloe and Lamar
Khloe Kardashian and Lamar Odom married in 2009 but separated in 2013FREDERIC J. BROWN/AFP/GettyImages

"Do you remember those little cameras... they were little video cameras that you put in your pocket? That was my jam for a moment." A curious Cohen then quizzed the E! star on whether she still has the x-rated footage in her possession, to which Khloe replied: "I do. In my safe."

Khloe and Odom, 37, married after a whirlwind romance in 2009 but she filed for divorce citing irreconcilable differences in 2013. However, Khloe withdrew her divorce petition after Odom fell into a coma in October 2015 following an incident at a Las Vegas brothel. Although the divorce has been temporarily called off, Khloe and Odom have not reconciled and she is still dating NBA star James Harden.

Khloe's older sister Kim, 35, shot to fame in 2007 when the sex tape she filmed with then-boyfriend Ray J leaked. The video was sold to adult entertainment company Vivid Entertainment and transformed Kim into a household name, and earning her family the KUWTK reality series on E!

When asked how Kim would explain the sex tape to her children, daughter North and son Saint, Khloe said: "Good question but I don't know. That's what mums and dads do, I don't know, to their own kids. I have no idea. That's what mums and dads have to do. Do they all? I don't know."

Kocktails With Khloe debuts on US cable TV channel FYI on 20 January 2016.