Khloe Kardashian and Kim Kardashian West may be sisters, as well as business partners, but there is something Khloe Kardashian does that makes her sister sick.

That’s a bold statement, and it came straight from the horse’s mouth.

In a clip for this coming Sunday’s episode of Keeping Up With the Kardashians, Kim gets after Khloe Kardashian for supposedly flirting with ex-husband Lamar Odom.

In the scene, Lamar calls Khloe on her phone.

“I’m with Kim, can I call you back?” she asks as she answers the phone. The two reportedly wind up chatting for a few minutes anyway, much to Kim’s dismay.

Khloe Kardashian takes the call outside and Kim Kardashian West continues in an on-camera interview.

“I don’t know why Khloé and Lamar are talking, but he hurt her so badly,” Kim says.

“As a big sister, I’m just really protective and for her just to be flirting with him on the phone makes me like, sick to my stomach,” she adds.

Khloe Kardashian can sense that Kim is watching her, so she wraps up her call with Lamar Odom.

Kim Kardashian West confronts Khloé Kardashian about 'flirting' with ex Lamar Odom https://t.co/4tKkNcWjQw pic.twitter.com/buH33dmaml

— People magazine (@people) October 1, 2015

“Kim is staring at me, I have to go,” she says to Lamar.

“Like, I just can’t take it,” Kardashian West says once Khloe has hung up. “The fact that when he decides to come around and be friendly, you’re like, flirting with him.”

“I’m flirting with him how?” Khloe asks. “By answering the phone and saying hello?”

“You’re just like, way more attentive,” Kim Kardashian West replies, adding that Khloe would be much more dismissive if the phone call had come from her other ex, rapper French Montana.

“Why would French and Lamar even be in the same category?” Khloe Kardashian asks.

This isn’t the first time Kim has gotten after Khloe for her concern over Lamar Odom. She questioned Khloe when she checked up on Lamar while they were on their trip to Armenia.

Do you think there is any chance that Khloe Kardashian will take Lamar Odom back? Isn’t she dating James Harden–must to Lamar’s dislike?

While it’s certainly nice of Kim to look out for Khloe, she needs to leave her sister alone to make her own decisions. Saying that Khloe flirting with Lamar makes her sick is a bit dramatic–don’t you think?

Kim Kardashian West isn’t exactly known for making great ones herself.

Can everyone say “Kris Humphries?”