'I can't take this s***': Kim Kardashian rants about brother Rob after he skips family's baby shower on KUWTK finale

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Rob Kardashian left his sister Kim furious on Sunday's season finale of Keeping Up With The Kardashians after he skipped a family-planned baby shower.

Kim and her sisters put a lot of effort into planning a lavish party – but Rob and his fiancee Blac Chyna had a blazing row at the final hour and neither of them attended.

'What a little butt face,' griped his sisters, who were left standing awkwardly among the gifts and balloons.

Baby shower: Kim Kardashian was left fuming at her brother Rob on Sunday's season 12 finale of Keeping Up With The Kardashians after he skipped a planned baby shower

'I can't take this s***, I can't tiptoe anymore, like I've had it,' raged Kim, who said she'd been 'bending over backwards' to make Rob happy.

'Rob ruins everything,' agreed Khloé, who was also bitterly disappointed.

A few days later Rob apologised to his family and spelled out 'I love you' in balloons for Kris Jenner, who forgave him instantly.

'I just have the best kids,' cooed his mother.

No show: Rob failed to show at the baby shower that his family planned for him

Body language: Khloe was also peeved at Rob for bailing on the shower

'We support their crazy a**es,' conceded Kim, who arranged for everyone to rush over to give Rob and Chyna their gifts 'quickly…before they start fighting again'.

'It was a misunderstanding,' explained Rob, who said he sometimes allows his feuds with Chyna to overwhelm him.

The show opened with Kourtney, Kim and Khloé planning the special day for Chyna and her baby.

The explanation: Rob explained that it was a 'misunderstanding'

Balloon message: The sock designer sent balloons to his mother's house to apologize

Best kids: Kris cooed that she has the 'best kids' after seeing the balloons

The trio also complained that their mother had not been the best 'momager' lately.

'Mom is so f***ing annoying,' said Khloé.

'I haven't been able to reach mom or get any direct answers out of her…like I'm super annoyed,' added the reality star, who hoped to launch a 'fitness survival backpack'.

So annoying: Kim and Khloe complained about a lack of attention from momager Kris

'She's been dropping the ball a lot lately, we all feel a little bit neglected sometimes,' agreed Kim, 36.

They then heard their mother had been in a serious car accident.

Forgetting their grievances the whole crew rushed to be with Kris, whose car was 'totaled'.

Car accident: Kris got into a scary car accident that sent her children rallying around her

'It happened so fast,' said Kris, who was honored that her kids had sprung to be by her side.

'That comforted me so much,' said the 61-year-old momager.

Even Kanye West made an appearance to give Kris a hug following her ordeal.

Big hug: Kanye West hugged Kris after her ordeal

Kim stepped in to help Kris manage her myriad chores as momager – which proved far harder than she'd expected.

Kim stopped by Kylie's shoot for Complex magazine to offer some advice, and became concerned the photos wouldn't be sexy enough.

'I need you to do raunchy, like a** out, why didn't you tell me? I would have called them,' Kim sighed as she pawed through the wardrobe options.

Offering advice: Kim checked in on Kylie during her Complex magazine photoshoot

Sexy shoot: Kylie told Kim that she was doing a sex photoshoot

'Juggling it all is a lot,' she admitted.

Kim later left Khloé high and dry at a merchandise meeting about her backpack business.

'She's nowhere to be found,' sighed Khloé, who was struggling to make the major decisions by herself.

Backpack business: Khloe was seeking traction for her fitness survival backpack idea

'It's not OK,' she complained.

Khloé, 32, later confronted her big sister about her absence only to be met with excuses from Kim.

'Don't f***ing double book,' Khloé told her.

Double booked: Kim was confronted by Khloe for skipping her meeting

'You're acting just like mom, mom forgets about me all the time,' she grumbled.

Kim vowed to be better next time.

'I feel really bad…I should have been there,' admitted Kim, who was discovering newfound empathy for her overworked mother.

Recovery time: Kris while recovering from the car accident let Kim handle some of her duties

Much harder: Kim acknowledged that her mother's job was harder than she thought

Rob told his sisters that he and Chyna, who was then pregnant, were still not living together.

'Have you read any baby books? Do you know how to take care of a baby?' asked Khloé.

'No,' admitted the 29-year-old sock designer.

No clue: Rob admitted that he didn't know how to take care of a baby

Scott Disick suggested Rob take parenting classes.

'It's important for him to have a close relationship with his baby,' said Scott, 33, who admitted that he had not always been the best father to his kids with Kourtney.

Rob learned how to bathe, diaper and dress a baby.

Parenting lessons: Scott Disick arranged for parenting lessons for Rob

While making a few mistakes he proved himself willing to learn, and even gave the plastic dolls some kisses.

Scott then tested him on some real children.

They all started crying and making an unholy mess, but Rob gave them affection and they warmed to him.

Hands on: Rob got a taste of parenting with children at a family daycare center

'You're a good-hearted person and you're gonna be a good-hearted dad, that you can't teach,' Scott told him.

Kris, who was recovering well, went shopping with Scott for Rob's baby shower.

'Do you have a breast pump?' Kris asked the salesperson.

Hugged it out: Scott told Rob that he would make a great parent

Shower shopping: Kris and Scott went shopping for the baby shower together

'Yeah but we need a huge one because she's got huge knockers,' chimed in Scott.

Before the shower Rob and Chyna had a fight and Rob refused to come.

The girls were not accepting his flaky attitude and Chyna volunteered to bow out of the celebrations.

But Rob still didn't show up, which enraged and saddened his sisters.

The family will return for the Rob & Chyna Baby Special airing on December 18 on the E! network. 

Great party: The family stood around waiting for Rob and Blac Chyna to arrive

Sweet presents: There were plenty of gifts waiting at the baby shower