She said a witness, Simon Turner, was walking past the house where Mr Marshall and Ford had been drinking.
Ms Carter said he will describe hearing angry voices and seeing Ford collecting what appeared to be a bag of clothes off the lawn.
"He could hear female and male voices yelling from the address. He could hear Mr Marshall yelling: 'get out' and 'piss off'."
He said he also saw a make-up bag land on the lawn before Ford started yelling obscenities.
"And in Mr Turner's words, 'that's when all the s**t started'."
Ms Carter said Ford slapped Mr Marshall before he punched her in the face, grabbed her hair and slammed the back of her head into a doorframe.
She said Ford used both her hands to scratch Mr Marshall's face and drew blood before the pair went inside and continued yelling.
"The Crown says the accused suffered no further injuries."
Ms Carter said Ford went into the kitchen and got a knife.
"She stabbed Mr Marshall so hard that the knife went into his chest to the full length, right up to the handle."
Mr Marshall stumbled into the lounge room where he collapsed and died.
Ms Carter said Ford put the knife in the kitchen sink, washed some blood off and called an ambulance.
A jury of six men and six women have been empanelled to hear the case which is set down for two weeks and will hear evidence from 39 witnesses.
