VIDEO: Kourtney Kardashian Fears Someone is Stealing Her Money in New 'KUWTK' Clip

Is there a thief in Kourtney Kardashian's house? During a promo clip for the next Keeping Up With the Kardashians episode, the 40-year-old star is hanging out with her younger sister, Khloé, when Kourtney's assistant comes in and tells Kourtney that there's money missing from her wallet.

As reported by US Weekly, her assistant, Megan, asks Kourtney if she spent the cash when she went out a few nights prior. The mom-of-three insists that she remembered specifically handing a twenty dollar bill to the valet, and had hundreds that she "threw back in her bag." Megan goes on to tell her that there are no hundred dollar bills there.

Khloé then asks Kourtney, "Is there any chance you could have lost the money?" But Kourt replies, "It was definitely there. You know when you just know? I know for a fact."

During the confessional portion, Kourtney shares that this case of missing money isn't a coincidence, remembering a time when an iPad went missing. She adds, "I have people in and out of my house all day." However, she clarifies that these are people she trusts.

It certainly seems shady. Kourtney will have to get her Nancy Drew detective skills honed to figure out where her money and other gadgets are going. We'll see if she can figure out who the culprit is when KUWTK continues this Sunday.