Caroline Flack hit boyfriend Lewis with a phone and accused him of cheating after she found messages from a 60-year-old woman, a source has claimed.
Flack, 40, was arrested for assaulting her boyfriend Lewis Burton, 27, at their north London home during the early hours of Thursday morning.
A source claimed yesterday that the row was fuelled by a misunderstanding over messages from a woman in Lewis's tennis coaching class, according to The Sun.
'Caroline accused him of sleeping around and found messages on his mobile phone which made her angry and upset,' the source told The Sun.
Mr Burton shared a pictured of him with his girlfriend on Instagram next to a love heart yesterday morning
This is the moment Caroline Flack, 40, was arrested for assaulting her boyfriend Lewis Burton, 27, at their Islington residence in London
'They were from one of his tennis clients, a 60-year-old woman, which she misconstrued. Caroline got paranoid.'
The source said the message caused Flack to overthink and she was 'convinced' Lewis was flirting with another woman.
They added that a mobile phone hit Lewis during the row and glass was broken on the floor causing minor injuries to the couple.
Police were seen outside the Love Island presenter's, 40, Islington residence, where she lives with her partner, after reports emerged that a man had been attacked.
It comes after photographs showing Flack's blood spattered front door emerged yesterday.
Boyfriend Lewis was spotted for the first time since the assault arriving at his house in Sidcup this afternoon wearing a tracksuit, and left minutes later in a change of clothes and cap. He told waiting photographers: 'I have nothing to say.'
Earlier the 6ft 4in tennis player was seen leaving his home behind the wheel of his Range Rover after sharing a picture of himself with Flack on Instagram next to a love heart. His 40-year-old girlfriend is yet to be seen.
Flack is said to have needed hospital treatment after cutting her hand on broken glass after the alleged fight.
It was reported that Mr Burton shouted 'I was normal till I met her' as she was arrested by police. However, a friend today confirmed exclusively to MailOnline that he would not be pressing charges.
The friend said: 'Lewis is very upset and embarrassed about how this situation has blown up. It was a tiff between a couple that love each other and should never have ended up in the public domain.
Droplets of what appear to be blood were seen splattered on Caroline Flack's home following her arrest for assaulting her boyfriend Lewis Burton
Police were scrambled to Flack's north London home at 5.25am on Thursday. Pictured is her door today
Lewis Burton was today seen for the first time today as he arrived at his London flat this afternoon
The 6ft 4in tennis player arrived at his house in Sidcup this afternoon wearing a tracksuit, and left minutes later in a change of clothes
'He has not - and is not pressing charges. He loves Caroline and wants things to be back to normal as soon as possible.'
Mr Burton has seemed particularly keen to keep to a low-profile following the explosive news that has plagued the couple over the past two days.
Love Island star Flack will appear at Highbury Corner Magistrates Court on December 23 charged with assault by beating.
Mr Burton leaving his home in Sidcup, south east London. Earlier he was seen leaving his home behind the wheel of his Range Rover
Mr Burton told waiting photographers: 'I have nothing to say' before he left his property
Eyewitnesses have described 'total chaos' outside Flack's home as police arrived to diffuse the situation with her boyfriend.
Flack was reportedly left in need of hospital treatment after accidentally cutting herself on broken glass during the incident.
A family friend said: 'There is not much to say. We are not people who like to gossip. I hope people respect the situation.'
It was reported that Mr Burton shouted 'I was normal till I met her' as she was arrested and charged with assault after an alleged fight at her home, it has been claimed (pictured in October)
Mr Burton was driven by an aide as they left his house after the explosive news came to light
Caroline is yet to appear since the allegedly violent incident at her London home
An eyewitness who spoke to The Daily Star, Mr Burton is said to have shouted at police as they escorted him to a waiting car: 'Bruv, I was normal until I met her.'
While other neighbours described 'police cars everywhere' and shocking scenes despite the couple seeming like 'they've been getting on well'.
Louise Silver, 36, told MailOnline: 'It was total chaos. There were police cars everywhere.
'At first I thought it might have been a terrorist incident but then I looked out and saw police going into Flack's home. They brought her out soon after.'
Mr Burton seemed particularly keen to keep to a low-profile following the explosive news that has plagued the couple over the past two days
In exclusive pictures obtained by MailOnline, police (officer seen left) were seen securing Caroline's home (right) on Friday following her arrest
Police were called to Flack's home in Islington, north London , in the early hours of yesterday morning to reports of a man being assaulted (she is pictured with boyfriend Lewis Burton in October)
The TV presenter's arrest has thrown ITV's first ever winter version of Love Island into doubt, with filming due to start in South Africa on January 8 (she is pictured on the latest series of Love Island)
Anton Smith added: 'There must have been around six police cars and a police van. We see Caroline and her boyfriend coming in and out of the house and around the area.
'It must have been around 5am and it was total chaos. I was on my way to work and didn't know what was going on. It was only when I got home that somebody in the block told me she'd been arrested.'
And speaking to The Sun, which learnt of Flack requiring hospital treatment, another neighbour said: 'There were several police cars at Caroline's house.
'I know Caroline and this new man. She's very friendly and always speaks to us. I hope things sort themselves out.'
Flack was arrested and charged with assault by beating on Friday following a fight at the London home she shares with her boyfriend
Eyewitnesses have described 'total chaos' outside Flack's home as police arrived to diffuse the situation between her and her 27-year-old former professional tennis player boyfriend (pictured, police at the scene)
Flack and Mr Burton are pictured together in August. ITV have not yet commented on her arrest
Flack's good friend Dawn O'Porter, who she met in 2010 when filming I'm A Celebrity…Get Me Out Of Here, threw her support behind the Love Island star following the arrest
The TV presenter's arrest has thrown ITV's first ever winter version of Love Island into doubt, with filming due to start in South Africa on January 8.
And a source close to the show told The Sun the incident was an 'absolute nightmare' so near to the start of the new series.
Flack was due to jet off on location with a brand new batch of contestants in the first week of January but it is not clear whether she will still be able to go. ITV have not yet commented on her arrest.
Caroline's good friend Dawn O'Porter, who she met in 2010 when filming I'm A Celebrity…Get Me Out Of Here, threw her support behind the Love Island star following the arrest.
Her former fiancé Andrew Brady, who claimed he would have died if he remained in their relationship, took to Twitter in the early hours on Saturday morning to pen: 'Sad that I'm not more surprised by the news'
She said on Twitter: 'Woken up to some really hard news about my friend Caroline Flack. Who I love very very much.
'I will wait until I know the facts before I make a judgement, and I urge you to do the same. This cancel culture doesn't help anyone.
'You weren't there. You don't know. That's it.'
Her former fiancé Andrew Brady, who claimed he would have died if he remained in their relationship, took to Twitter in the early hours on Saturday morning to pen: 'Sad that I'm not more surprised by the news'sonos sonos One (Gen 2) - Voice Controlled Smart Speaker with Amazon Alexa Built-in - Black read more
There are three forms of assault: Common assault, actual bodily harm and grievous bodily harm.
Under section 39 of the Criminal Justice Act 1988, a common assault is committed when they inflict violence on someone or make that person believe they are being attacked.
They do not have to physically attack the person, spitting or raising a fist would suffice.
But if violence is used in the assault they can be charged with assault by beating.
The maximum sentence allowed by law for common assault is six months imprisonment, and cases can only be heard in the magistrates' court.
An eyewitness told the Star: 'There have been police outside since 5.30am and