Whata began squeezing her around her neck and placed her in a choker hold as she tried to break free.
"She had decided to play dead and went limp and you let her go. You said to her, 'Maybe I should just kill you'. You later went to the kitchen to get something to eat while the victim ran to the neighbour's house who let her in and closed the front door."
Seconds later, Whata smashed through the door and entered the house yelling for the victim to come out.
"Children were in the house ... they were screaming and were extremely terrified. The neighbour grabbed her children, ran onto the road and flagged someone down to call the police."
The victim suffered severe bruising and swelling to her eye but refused medical attention at the time.
Whata had previously received a head injury but a psychological report stated his history of domestic violence pre-dated his injury.
His lawyer Martin Hine said his client was someone clearly needing help and questioned whether he would access that in custody.
"I cannot risk anything further going wrong with you in the near future," Judge McGuire said. "A term of imprisonment has to be the outcome for today."
Whata was sentenced to two years nine months' prison and ordered to pay $251.43 reparation for damage to the door.