Talk about a public war of words!

Just one day after Rob Kardashian took to Twitter to accuse girlfriend Rita Ora of sleeping with more than twenty men behind his back, now the reality star is making more sensational accusations, claiming that he impregnated the "R.I.P" singer before their recent split!

As if that wasn't enough, Kim K's younger brother also blasts the British beauty for having unprotected sex during her various affairs! "So you let me get you pregnant and you let others hit raw?" he tweeted in response to Ora's tweet, "Rob's d**k was wack, I had to go get it somewhere else."

Clean it up, you two! Twitter is public if you haven't realized that!

Although both their vicious tweets have since been deleted, that doesn't mean the feud is over! Even Rob's family, including his sister Khloe, has gotten involved in the drama! "Rob be nice kiddddd," she tweeted at her little bro.

We're dying to know what Kris Jenner thinks of this situation! She's probably busy brainstorming a publicity stunt to distract people from this ongoing scandal!

Rob Kardashian and songstress Rita Ora have gone their separate ways!

Kim Kardashian's little brother posted a series of Tweets including the following: "She cheated on me with nearly 20 dudes while we were together... But I mean 20?!!!!"

He added, "I am actually disgusted." Yikes!

The Tweets have since been deleted.

Rob Kardashian isn't single any longer! Kim's younger 25-year-old bro is ready to show his love for songstress Rita Ora.

The budding sock designer posed for several romantic snapshots with his ladylove. Rob has been traveling with Ms. Ora during the U.S. portion of her tour.

If the tour bus is rockin' ...

What's the rush?

Yesterday, cameras caught Rob Kardashian hauling his backpack while bustling his way through Beverly Hills. Wonder where he was headed?

The 25-year-old reality star just came back from trip to Paris with mom Kris Jenner and they even met up with Francesca Eastwood during their stay. Sounds like an ideal mother/son vacation!

Paging rumor patrol!

After pictures surfaced over the weekend of Rob Kardashian go-karting and clubbing with pop princess Rihanna, the Keeping Up with the Kardashians star chatted with Ryan Seacrest to dispel the romance speculation.

"It was just me and a bunch of girls [at the go-kart place]. It's because Rihanna's a friend, and she is friends with my friend Capricorn, and it was Cap's birthday. We all went out to celebrate our friend's birthday. It was fun. It was a good night," the 25-year-old explained to the radio host.

He might not be dating RiRi, but is he involved with fellow Roc Nation artist Rita Ora? It's anyone's best guess, but Kimmy K's little brother didn't exactly deny it.

Asked about the reports that the pair got matching temporary tattoos of each other's names, the ladies man played coy, revealing, "Rita is in the U.K. I'm just a fan. That's all. I'm a big fan. She does have tattoos."

This isn't the first time the USC grad and the British singer have been linked as a couple.

"It's not really a relationship. It's not that intense. He's a cool guy. We're close. We're good friends. I got his back and he's got mine," Ora dished to Complex magazine this past July.

We're a little disappointed Rob isn't dating the good girl gone bad!

Now THAT'S an odd couple!

Rihanna went on a date with Rob Kardashian Saturday night -- and though it started with a pretty innocuous trip to Racer's Edge Indoor Karting in Burbank, it ended at Playhouse nightclub in Hollywood!

Just a week after Rihanna's self-expose on Oprah's Next Chapter, in which the singer said she still loves Chris Brown despite his arrest for physically assaulting her in 2009, RiRi stepped out with the least famous Kardashian.

This isn't Rob's first foray into dating hot pop stars ... the reality show star was dating UK's Rita Ora not too long ago and even went on a double date with his honey and sister Kim Kardashian and her beau Kanye West in May.

You think Rob and Rihanna could last or will Ri race away from Rob as fast as you can say Chris Brown?

Looks like Kim Kardashian's little brother Rob has spent a chunk of his reality show money on pricey new wheels!

The former Dancing with the Stars hunk rolled around LA in a black Mercedes G-Wagen. The stylish SUV retails for around $110,000 ... and that's just the base price.

Nothing but the best for Robbie!

Get ready Dallas!

Now that Lamar Odom has been traded from the LA Lakers to the Dallas Mavericks, the Lone Star State is about to get a double dose of the Kardashians!

The NBA star and his wifey are gearing up to move their entire life/reality show from the West Coast to the big Southern state, and little brother Rob has decided to come along for the ride.

Odom revealed that Rob will join the couple in Texas, along with Khloe's friend Malika Haqq, to film upcoming episodes of Khloe & Lamar.

"We'll have the whole family here," Odom told Us Weekly on Tuesday at the Dallas Mavericks' press day, adding, "Khloe is a great wife. She'll make anywhere feel like home."

The former LA Laker is currently embracing his new life in the south, confessing: "[Dallas] is a great city. It reminds me a lot of Beverly Hills [or] Orange County. You can tell the city is really behind their team. It's a more relaxed atmosphere here, too, which is nice. I'm disappointed to leave my home, but I'm here now. I'm a Maverick."

And the Texan b-ball players are just as excited to have the reality stars support their team.

Mavericks coach Mark Cuban told Extra: "You know, we had a 'team' meeting, and we all decided that Khloe is the official favorite Kardashian of the Dallas Mavericks. She's welcome with open arms. We can't wait to have the whole family, can't wait to have Khloe and Lamar, we'll go from there."

Be careful what you wish for!