He admitted he pushed Martin O'Hagan, Kimberley's brother, but said it was in self defence. He then tried to remove himself from the situation, and in the process drove into Marianne O'Hagan's car repeatedly.
"I completely accept that I dented that car. I was stressed, I was upset ... I couldn't find my f***ing cat anywhere."
Stables has pleaded guilty to intentionally damaging the car, but not guilty to assaulting Marianne, Martin and Kimberley's father, Robert. He has also pleaded not guilty to threatening to kill.
Under cross-examination, Stables said tensions were through the roof, and accepted he assaulted Martin "after they pushed me, after I have been ganged up [on] by an entire family".
Asked whether he was lying, Stables replied: "I have nothing left. I have lost my career, I have lost everything ... what have I got to gain? I have already been screwed."
The jury of 11 was sent home late on Friday night and will return tomorrow. It has already spent more than four hours' deliberating.