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On Saturday, Kourtney and Khloe Kardashian learned a hard lesson: if you make Kim late, be prepared to suffer.

When the sisters' workout with the family trainer ran late, they got an earful from middle sister Kim.

While the impatient star waited to workout with a friend, the mother-of-two took to Snapchat to vent her frustrations and call out her sisters for their 'rude' behavior.

No time for tardiness! Kim Kardashian vented her frustrations on Snapchat after her sister's tardiness made her workout start over 30-minutes late 

The star's anger is made comical as she uses a bunny-themed filter that made the star's voice high and squeaky. 

In the snap, Kim doesn't mince words as she tells the camera flatly: 'Okay, seriously, Kourtney and Khloe: f*** you.'

She continues: 'This is so rude. I have been sitting in my garage waiting for the trainer for 30 minutes. I do have a life.'

On the wrong foot: The social media sensation showed off her Yeezys as she and a friend waited for their trainer to arrive. In the snap, Kim has some angry words for her sisters

Strong words! After the mother-of-two got the family trainer to tattle on her sisters, Kim captioned her snap with some salty words for her sister

The family trainer soon arrived, but that didn't mean he was off the hook yet. After the reality diva ribs her trainer a bit, she tries to make him tattle on who was late.

She jokes at her fitness pro, saying: 'Oh look who decided to show up!' before prodding her trainer to reveal the truth, asking: 'Who was late? … Tell me, Joel. Who was late?'

After the mother-of-two gets the family trainer to dish on her sisters, Kim gave a salty caption to her snaps, saying "F*** YOU KOURTNEY!!!! And they say I'm always late! SMH'.

'The New Workout Plan' Kanye West hit the gym on Saturday too, as he was pictured out with his trainer Coach Don early in the AM

Kim and company got right to business, then showing off some fast-forwarded kicks from her workout in the next snap. 

Across town, it appeared that husband Kanye was also hitting the gym as he appeared with trainer Coach Don.

The multi-platinum artist looked ready to sweat as he appeared at the gym wearing a hoodie and white kicks. Kayne sported a surprisingly bright smile during the morning outing.

All smiles: During his morning workout, the Bound 2 artist flashed an uncharacteristically bright smile

Hard work: Kourtney flashed her flat tummy in her fitted leggings and grey hoodie during her workout with sister Khloe

Since it was workout day for all of the family, Khloe and Kourtney also shared their earlier exercising on social media.

The knockout duo made the most of their sweat, showing off a number of heavy-duty core exercises for Snapchat.

All three Kardashian ladies have been getting great results from their intense workouts with trainer Joel Bouraima, who appeared in their snaps.

Focused: During their training session on the basketball court, the sisters are seen working with ropes, weights and doing lunges

All the right moves: On Saturday, Kourtney and sister Khloe Kardashian enjoyed a grueling workout with their personal trainer

After their morning workouts, the Keeping Up With The Kardashians star and husband Kanye West shared some quality time together in Beverly Hills.

The social media celeb hid behind her long raven hair as she walked into the building without showing her face.

Kim wore a simple red flannel ensemble while Kanye looked smart in a white tee and letterman jacket before the couple disappeared inside.

Afternoon treat: Kim Kardashian was spotted out in Beverly Hills with husband Kanye West late Saturday

College dropout: Kanye looked cool in a black letterman jacket paired with a white tee

Hidden beauty: The social media mogul carefully shielded her face with her own long dark hair