Teen Mom star Farrah Abraham launched an online attack against the 32-year-old reality star and her family yesterday.
She wrote on her Twitter page: 'Im Shocked Kourtney Kardashian is pregnant again, Did she not learn anything from TEEN MOM? Maybe its a fake pregnancy like kims wedding SAD.'
Twitter war! Pregnant Kourtney Kardashian and Teen Mom star Farrah Abraham are sparring online
Kourtney, who announced her second pregnancy with boyfriend Scott Disick earlier this week, wasn't going to take that particular slight lying down.
'Why would I have anything to do with Teen Mom? I'm 32 years old!' she responded.
Christmastime again! The 32-year-old and boyfriend Scott Disick went shopping at Neiman Marcus in LA yesterday
Unhappy camper: Is this where Kourtney decided to respond to Farrah's Twitter insults?
Disick also jumped in to defend the situation, though his retaliation involved a bit of name-calling.
'We're teenagers, y a f***ing moron,' he wrote.
When Kourtney's younger sister Khloe asked the 28-year-old if he had ever heard of Abraham, his response was more than a little bit blunt.
Ring shopping, Kourtney? The 32-year-old peruses the jewellery department at Neiman Marcus
Khloe, 27, didn't respond, but sweetly noted that she had 'never met a better mother than Kourtney.'
After realising that she wouldn't win in a battle against the Kardashian clan, Abraham decided to retract her former comments.
Chanel-ing: The reality star stepped out wearing a Chanel ensemble yesterday
Not showing yet: The E! network star is nine months pregnant but it's hard to see her bump now
Aside from dealing with hostility from Abraham on Twitter, the eldest Kardashian daughter has been enjoying her pregnancy.
She glowed with happiness as she and Disick stepped out for breakfast and some Christmas shopping at Neiman Marcus in Los Angeles yesterday.
Black tie affair: Kourtney Kardashian, who announced that she is pregnant for the second time on Wednesday, stepped out in a tuxedo style outfit for breakfast with partner Scott Disick, today
She accessorised the look with some fifties-style sunglasses and lashings of red lip-stick.
Kourtney, whose usually accustomed to wearing sky-high heels, opted for a pair of comfortable lace-up flats.
No baby bump yet: Seeing as she is just nine weeks pregnant, there was little sign of a baby bump under her outfit
In a statement to E!, Kourtney revealed that she was expecting with Scott for the second time on Wednesday.
'Scott and I are so excited to announce that we are expecting our second child and are thrilled to be expanding the love in our family,' she said.
The reality show star first revealed the news to this week's issue of Us Weekly.
Comfy flats: Kourtney, whose usually accustomed to wearing sky-high heels, opted for a pair of comfortable lace-up flats
The older sibling of Kim and Khloé told how she woke partner Scott up at seven o'clock after taking a positive pregnancy test to share the news.
And Kourtney was so excited, she couldn't wait the traditional amount of time before sharing it with the world.
Happy news: In a statement to E!, Kourtney revealed that she was expecting with Scott for the second time on Wednesday
In an episode of Keeping Up With the Kardashians in July, Kourtney was seen clashing with mother Kris Jenner after she mentioned that she and Scott were considering trying for another baby.
While their first child Mason was a happy surprise, the family matriarch is adamant that the couple should be married before thinking about expanding their family.
Not blue at all: Kourtney seen here on the day that she announced her news
Kourtney and Scott have broken up a number of times over Kourtney's disapproval of her partner's hard partying and anger issues.
During their stint in Miami last year, Kourtney ordered him to leave her and their son alone after he turned violent and smashed a mirror, telling him 'I love Mason more than I love you.'
New sibling: The couple are already parents to adorable Mason, who turns two next month
He even proposed to an unimpressed Kourtney in the final episode of last season's Kourtney and Kim Take New York.
Turning down his offer of marriage during dinner on their four-and-a-half year anniversary in April, Kourtney asked, 'Things are so good right now, why would we want to change that?'
Excited: Kim Kardashian tweeted her congratulations to her older sister
'It wasn't like we weren't trying,' Scott said 'We kind of just said, "If it's meant to be, it'll be.'"
However, Entertainment Tonight reported that there may well be a wedding in the works for the oldest Kardashian daughter.
Sources told the website and news show that the wedding will be the 'complete antithesis of sister Kim's lavish affair and that it will be low key, just family,' with 'whispers that it will take place at the Kardashian family home.'
The 31-year-old said in a magazine interview this week that she feels her dreams of children may be dashed.
‘At first I was like, I want six kids. Then I went down to four, then I was down to three, and now I'm like, maybe I won't have any.
Holding a secret! Kourtney, on Tuesday, just one day before making her happy announcement
However, Kim this week tweeted her excitement at her sister's happy news.
'This is such a blessing and the whole family is beyond thrilled!' she wrote. 'I just know Mason will make the best big brother and I can’t wait to meet my new little niece or nephew!
Expanding the clan: The Kardashians, seen in their Christmas card snap this year, will have another face for next year's picture
And her sister Kendall Jenner also tweeted her excitement about the news.
'My sister's [pregnant again!!!!' she wrote. 'Congratulations @KourtneyKardash and @ScottDisick!!!! You guys will make great parents...AGAIN! :)'