A man who stabbed his wife to death had previously threatened to "slaughter" and "choke" her, his eldest daughter has told a court.
Haydar Haydar, 60, has pleaded not guilty to murder but guilty to the manslaughter of his wife and mother of his children, Salwa Haydar, 45, in their Bexley townhouse in March 2015.
On Thursday, the couple's eldest daughter Amani Haydar said her parents frequently argued and spoke about separation and divorce.
Amani Haydar said her parents - he a taxi driver and English language teacher, she a drug and alcohol counsellor at St Vincent's Hospital - had "incompatible" personalities and also clashed because of their 13-year age gap.
She said that, on one occasion, she saw her father threaten her mother in Arabic.
"He said, 'I will slaughter you or I will choke you,' " Ms Haydar said.
On another occasion, she saw her father push her mother up against a wall.
She also described him calling her mother "disgusting" for wanting a divorce.
Once she married in 2013, Amani Haydar said she avoided the family home because of the animosity and heated arguments.
Earlier on Thursday, daughter Nour Haydar said her father claimed he wouldn't divorce his wife while his daughters remained unmarried because of societal attitudes towards single mothers.
The tumultuous relationship worsened after her troubled brother Ibrahim hit her mother and was later jailed for drug matters.
Nour Haydar said her mother blamed her husband for failing to bring their son into line.
The couple had each bought their own places but were living together in the Bexley townhouse owned by Mrs Haydar.
On the day Mrs Haydar was killed, Mr Haydar had returned unexpectedly, and without telling his family, from a trip to see his ill mother in Lebanon.
Nour said her father seemed "very tired" and told her he hadn't slept well for the fortnight he was in Lebanon
He asked her and her sister Ola whether their mother would ever be unfaithful to him and grabbed a Koran and swore on it that he had always been faithful to her.
Nour said he implied he had had opportunities to have relationships with students to whom he taught English as a second language but had not acted on them.
He also asked his daughters if they thought his wife would want to remarry if they divorced. Nour said she told him her mother "wanted to be alone".
The trial has heard Mr Haydar stabbed Mrs Haydar about 30 times and also stabbed Ola as she tried to intervene.
The defence case is that Mr Haydar should be found guilty of the lesser charge of manslaughter because he was suffering from a substantial impairment due to depression at the time of the killing.
The trial before Justice Peter Garling, sitting without a jury, continues.