Reality Star Kris Jenner. Picture: Instagram

In an upcoming episode of 'Keeping Up with the Kardashians', Kris Jenner can be seen going to extreme lengths to find out whether or not the drinking water system at her famous Los Angeles abode has been tampered with after being convinced someone is out to get her.

A worried Kris tells her 34-year-old daughter Khloe Kardashian: "I don't know if there's something wrong with my drinking water."

The businesswoman then decides to use a home testing kit to check out her water, leading Kim Kardashian West to label her mom "beyond extra".

The 37-year-old star tells Kris: "I know you're extra a lot of the time, but this is above and beyond extra."

Though the results come back normal, Kris - who is also mother to Kourtney Kardashian, 39, Rob Kardashian, 31, Kendall Jenner, 22, and Kylie Jenner, 21- isn't done with her investigation and resorts to the "drawing board" to find out why she became poorly.

Revealing the results, she says: "They're slightly different in colouration, but within drinking limits. So, we can rule out the water and back to the drawing board.

"Well, if somebody's poisoning me, I'm gonna get to the bottom of it."

Meanwhile, Kris recently fuelled speculation she's engaged to Corey Gamble.

The matriarch sparked reports she and her partner have taken their relationship to the next level after being pictured numerous times sporting a huge diamond on her ring finger, but she refused to answer any questions on the subject.

Instead, during a game of 'Spill Your Guts or Fill Your Guts' while appearing as a guest on James Corden's 'Late Late Show' earlier this month, Kris opted to eat dead crickets rather than reveal whether or not she was engaged.

She said: "No, I am not going to answer."

As she struggled to eat the insects, James laughed and said the ring answered the question on its own - but she then slipped up with her response.

She retorted: "This is not the ring."

The host replied: "But there is a ring!"