A woman told her ex-partner that she was going to turn up at his Lepton home in a wedding dress - before throwing eggs around the property and attacking him.
Enraged Letitia Simmonds then turned on John Tarazi’s new girlfriend, hurling racist abuse at her and damaging her car.
The mum-of-two even assaulted the police officer who arrived to arrest her, Kirklees magistrates heard.
They were told that the 25-year-old lashed out after discovering her former partner of six years with his new love.
She pleaded guilty to two charges of criminal damage, assault, racially-aggravated disorderly behaviour and assaulting a police constable acting in the execution of his duty.
Prosecutor Bill Astin told the Huddersfield court that the relationship between Simmonds and Mr Tarazi - the father of her sons - broke down last September.
Both moved on to new partners but then Simmons’ new relationship ended and this had an enormous impact on her.
She began sending abusive messages and Facebook postings about his new girlfriend Bria Massey.
Mr Astin said: “She turned up at his home and was in drink and abusive.
“A few days later he got a call saying she was at his house in a wedding dress.”
Mr Tarazi called police after returning to his home in Rowley Hill to find Simmonds there being verbally abusive.
Magistrates heard that Simmonds, of Towngate, Highburton, was admitted into hospital after harming herself.
On May 17 Mr Tarazi and Miss Massey went to her home to collect some clothes to take to her during her hospital stay. But she came back while they were still there, became abusive and they left.
Mr Tarazi then returned to his home to find that his conservatory window had been smashed using a paint tin and eggs had been thrown all over the floor.
Simmonds came to his home later smelling of alcohol and demanding to see their children but he wouldn’t let her in.
Mr Astin said: “The defendant was upset, Miss Massey then came back and she (Simmonds) ran towards her car saying she was going to smash her face.
“Miss Massey tried to reverse away but Simmonds punched and kicked her car.
“The defendant called her a n***r. Mr Tarazi became very concerned about his partner’s safety and ran over to try and get hold of Simmonds.
“She kicked and punched him, scratched and bit him and he was shouting at the neighbours to call police.”
Simmonds then kicked one of the officers in his shin as he tried to arrest her.
The court that Simmonds had no previous convictions.
Her solicitor Simon Lindley explained that she had been suffering from mental health problems.
He said: “She wasn’t well but accepts that her behaviour was out of control.
“Her anxiety got the better of her and when she saw his new partner it got worse.”
“She knows she needs help.”
Magistrates adjourned sentencing until May 24 so that probation staff can prepare a full report on Simmonds.
In the meantime she is banned from contacting Mr Tarazi and Miss Massey and must stay out of Lepton.