They spend their days arguing, its comforting some how, at least then the house is filled with noise instead of the unbearable silence. Silence is the thing that scares them the most, because in the silence they are left alone with their thoughts, and sometimes that is even scarier than the silence. So they yell, turn the television up way to loud, anything to drown out the silence. But sometimes even the arguing isn't enough, sometimes their thoughts seep out into the arguments, and then once again they are left with the unbearable silence.
He left her, not because he had found someone better, he left because she asked him to. Not because he was tired of her. The words she yelled that day hurt worse than the silence. The words 'get out' echo in both of their minds, she didn't really mean them, she would take them back if she could. But she can't, so they hang in the air, like them smell of sour milk. Now they were once again left with their thoughts in the silence, but this time they were alone.