Newspaper editor Rebekah Wade says the argument with her actor husband Ross Kemp which led to her arrest was "a silly row which got out of hand".
Ross Kemp and Rebekah Wade were married in Las Vegas in 2002
Ms Wade, 37, who edits the Sun, was questioned by police after an alleged attack on the EastEnders star on Thursday at their south London home.
Mr Kemp, 41, who plays Grant Mitchell, said it was a "fuss about nothing".
Meanwhile, a 29-year-old woman has been cautioned for an alleged assault on his on-screen brother Steve McFadden.
Scotland Yard said Angela Bostock was arrested outside her home in Haringey, north London, on Thursday.
She is the mother of the 46-year-old Mr McFadden's two children.
'Bit of bother'
Police say they are not connecting the two incidents.
The McFadden incident is featured as the lead story on the Sun front page, with the headline: "EastEnders hardman beaten by lover."
The duo were among the soap's main characters in the 1990s
The incident involving the paper's first female editor is referred to at the bottom of the page, which reads: "And his bruv's had a bit of bother too".
Ms Wade told the paper it had just been a "silly row" and the paper also denied that Mr Kemp had been injured.
"A cut to his lip which was reported by news agencies had in fact been sustained during filming," it added.
Scotland Yard had said Mr Kemp sustained a cut to the mouth but declined medical treatment.
It said no further action would be taken against Ms Wade.
Ms Wade was arrested at 0400 GMT shortly after the couple, who married in a Las Vegas ceremony in June 2002, had returned to their Battersea home from a birthday party.
She had earlier met former Cabinet minister David Blunkett, who resigned as work and pensions secretary on Wednesday.
Thirteen million people watched the long-awaited return of Mr Kemp and Mr McFadden to EastEnders last month, boosting the show's flagging ratings.
Thursday's episode attracted 10.7 million viewers.
A spokesman for EastEnders declined to comment on the incidents.