Tarek El Moussa is 'super remorseful' for on-set tirade against ex Christina Haack... after he called her 'crazy' and said new fiancée Heather Rae Young is 'richer' and 'hotter'

Tarek El Moussa is sorry for lashing out at his ex-wife Christina Haack on the set of their HGTV series Flip Or Flop.

The 39-year-old reality TV star is 'super remorseful' for the public tongue-lashing, a source told People on Thursday.

'They did get into a disagreement. Tarek lashed out and he's super remorseful,' the source said.

The insider also clarified that, despite their history, Tarek and Christina, 38, don't have much of a connection outside of their popular home-flipping series.

'They're exes who share a history and children and a workplace, but outside of coparenting, they're not friends,' they added.

The confrontation between the former couple was set off because Tarek was annoyed at how Christina signaled that she and the rest of the crew were ready to begin filming a scene, TMZ reported on Tuesday.

He allegedly took the credit for Christina's success and called the mother of his children a 'washed-up loser.'

He also reportedly shouted, 'Look at me, look at me, look at me. It’s called winning,' and, 'The world knows you're crazy!' 

Tarek also brought his fiancée Heather Rae Young, 33, into the argument by saying she was 'hotter' and 'richer' than his ex.

On Thursday, Christina seemed to signal that things were again running smoothly on the series when she shared a short clip of crew working.

'Nice day on the Flip Or Flop set,' she wrote.

They on-set confrontation with Christina occurred shortly after she went public with her romance to new boyfriend Joshua Hall and opened up about a psychedelic trip brought on by smoking toad venom.

According to a source close to him, he was primed to lose his cool because he was angry about learning of the drug trip, which occurred before Christina hooked up with her new man.

Tarek's outburst appears to have come shortly before a break in filming, as Heather revealed on Wednesday that the couple had jetted off to St. Barts for a romantic getaway.

She shared a photo to her Instagram Stories of herself enjoying 'Breakfast with my sweet love' at the upscale Nikki Beach resort.

So far, her fiancé hasn't shared any photos from the trip, but he did inform his fans on Tuesday that '3 flights later and we made it to St. Barts.'

Despite being 'happy to be here' with the Selling Sunset star on the Caribbean island, he admitted that he '[misses his] babies already.'

El Moussa shares daughter Taylor, 10, and son Brayden, five, with Christina. 

The two were married in 2009 but split in 2016, with their divorce being finalized two years later.  

The divorce followed a chilling incident in May 2016, when law enforcement responded to a call about a possibly suicidal male with a gun at their home.

According to Witness, Tarek had been seen leaving the house with a gun and heading down a nearby hiking trail. Christina was also seen running out of the home while looking visibly upset. 

Police later intercepted Tarek, who surrendered his weapon, along with five other firearms found in the home, though he was not arrested.  

Since their divorce, the former couple continue to co-host Flip Or Flop and serve as executive producers together. 

In a recent Instagram post, the HGTV favorite revealed that she had recently smoked psychedelic toad venom, which she said had 'reset my brain and kicked out years of anxiety in 15 mins.' 

The toxin from the 'Bufo toad,' commonly known as Colorado river toad or the Sonoran desert toad, secretes a powerful venom which can be harvested and smoked to achieve a high.

Users of the psychedelic compound report a 'warm sensation, euphoria, and strong visual and auditory hallucinations,' that are said to be similar to the effects of ayahuasca, a brew used in South American spiritual practices.

The spiritual and psychic journey was a shocking departure from the buttoned-up appearance that Christina usually curates on her social media accounts and in her Flip Or Flop appearances.

In addition to the reinvigorating experience, Christina also took some time away from her social accounts and hired a 'spiritual coach,' though she didn't clarify if they were part of her toad trip.

In the same Instagram post, the reality star wrote of her new boyfriend: 'When we met this past spring, the synchronicities hit us so hard and fast they were impossible to ignore.'

In contrast to her ex, Ant Anstead, who's now dating Oscar winner Renee Zellweger, Christina seems to be craving a more down-to-earth partner after previously being married to two fellow entertainers. 

'I felt immediately crazy protective over him and wanted to keep him for myself and get to know each other before the tornado (media attention) hit,' she continued.

Christina called it quits with Ant in September 2020 after less than two years of marriage, something she shared regretfully in a lengthy statement published to Instagram at the time. The former couple share one-year-old son Hudson.