It's still on! Blac Chyna flashes her diamond engagement ring amid Rob Kardashian split rumors 

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Rumors are swirling that their romance is on the rocks.

But Blac Chyna sent a message about her love life on Friday during a joyride with her best friend Treasure.

The pregnant 28-year-old flashed the stunning diamond ring given to her by fiance Rob Kardashian as she cruised through Los Angeles, clearly keen to provide proof her engagement is still very much on.

Sending a message: Blac Chyna showed the world she was still wearing the diamond engagement given to her by fiance Rob Kardashian during an outing on Friday

It's still on her finger: : The model flashed her extremely eye-catching engagement ring for the cameras as she drove around with her pal Treasure

The mom-to-be showed her stunning accessory to the world as she turned her head to the left and placed her glammed-out hand upon her head. 

Chyna had a smile on her face as she chatted with her gal pal while sporting a black beanie and matching top. 

Eyes on the road, the reality star had her hands on the wheel as she navigated her car forward. 

There was no sign of Ron, though, whose phone number she shared with the world via Twitter almost 24 hours earlier.

Keeping her eyes on the road! The reality star had her hands on the wheel as she navigated her car forward

The model spilled the drama with her Snapchat fans on Thursday as she asked them in a video which featured Rob, 'To assure that your man is not texting no b**ches, just tweet his number out. How does that feel Rob, how you feel?'

'Feels good,' replies Rob, who is heard handling a swarm of text messages.

She goes on: 'Get your number changed, thank you.'

And she adds: 'To all these females who want to keep texting his phone because they had his number before, talk about, "you good? You and Chyna good? Nah, we good, we good, we good, we straight,"' she said.

Rob can be heard chuckling in the background as his phone is blowing up with messages.

While it wasn't clear what sparked the outburst, apparently her plan was meant to force the Kardashian reality star to change his phone number and lose touch with some female contacts.

Hitting the road! The 28-year-old caught up with her good friend as she maneuvered the car

Obviously, Rob utilized a similar tactic earlier in the week when he tweeted out half-sister Kylie Jenner's number in a fit of rage over a baby shower set to exclude pregnant mother Blac Chyna. 

The baby shower drama kicked off last week when it emerged the Kardashians had organised two separate baby showers for Chyna and Rob, because the couple were reportedly not speaking.

Rob then decided against going to his when he found out it was being filmed for Keeping Up With The Kardashians.

When his sisters told him Chyna couldn't come without him, he went on a Twitter rant, which culminated in him posting Kylie Jenner's number on the internet.

The model spilled the drama via Snapchat, advising fans: 'To assure that your man is not texting no b**ches, just tweet his number out. How does that feel Rob, how you feel?'

The digits: The star shared with the world her fiance's phone number on Thursday 

The source explained to Us Weekly magazine exactly how it went down: 'Here's what happened: Kim threw the shower. Kylie [was] the one that Rob called and told he wouldn't go to the shower, because she mentioned it was being filmed.

'He [then] got really upset and told her he wasn't going, but that Chyna still wanted to go. Chyna was all dressed up and ready to go, [but] Kylie then told him that Chyna wasn't invited if he wasn't going to be there.

'She said it was his shower and Chyna could come if they were together - but if he was going to screw them by not going, then Chyna couldn't come. That's when Rob exploded. It caused a huge fight between Rob and Chyna too, so that's when Rob went off on Kylie on Twitter.'

The couple are reportedly living in separate houses to keep them away from each other's throats, and have been getting on much better because of it.

Motivation? While it wasn't clear what sparked the outburst, apparently her plan was meant to force Rob to change his phone number and lose touch with some female contacts

Meanwhile, on Friday morning, Rob admitted the move to post Kylie's phone number online may not have been appropriate. 

'It was miscommunication on my end,' the reality star told Ryan Seacrest on his radio show, On Air With Ryan Seacrest, during an interview over the phone with Chyna. 

'I thought they weren't having Chyna at our baby shower. Chyna's baby shower is actually this Sunday, but they were trying to do a little surprise 'guy' baby shower for me and I was just upset trying to fight for Chyna like, 'Yo, she has to be at the baby shower. She's birthing my child. She needs to be there.'

'It was literally miscommunication and I probably shouldn't have went on Twitter, but I did.' 

The reality star also addressed rumours their relationship was on the rocks. 

'We've been together the whole time... We've been together, it's been a bumpy road, but a great road.'

When asked if the possibility of splitting up occurred at all during their relationship, Rob admitted, 'We've had our days, but there's never been a doubt in my mind, I've always wanted to be with Chyna.'

'It was miscommunication on my end': Rob admitted during an interview with On Air With Ryan Seacrest the move to post Kylie's phone number online may not have been appropriate (pictured in Malibu in April with Jenner)