Capers, cous-cous and dog food.
It was difficult to follow the fight, as it was shot in 'extreme shakeycam' form from the mobile phone POV. I probably misinterpreted the outcome.
What happened to Generator Man's wife? She seemed to disappear, probably around the point I left the room to make a cup of national-grid-heated tea.
I would guess from her disappearance from the screen, the fact that he is with one child and the arguments leading up to that scene that she has gone elsewhere either temporarily or permanently. It's not made clear, although considering the only source of information we have is (according to the premise) footage shot by him, it wouldn't be.