Jurors at Southwark Crown Court heard on Monday that Bourne and Ms Nascimento had been the only two people living in the house for around three months before the incident, with Bourne’s mother travelling abroad.
The 26-year-old was said to have called 999 afterwards, telling the operator he had stabbed a “demon woman” and that he was a “nice boy from Chelsea”, a court heard.
Jurors heard Bourne made a 999 call after the event, giving his name and telling the operator: “There is this demon woman in my house and I stabbed her.
In a statement read out by the prosecutor, Ms Nascimento said Bourne knocked on her door on the evening of February 25 last year asking her to come outside.
Maximillian Bourne was charged with the attempted murder of Joselia Pereira Do Nascimento at the luxury property in Justice Walk, Chelsea, on February 25 last year.