You ask Jack if his feet are tired, and he nods. 'I've been out working all day.'
You shrug, and tell him that maybe, if he wants, he could rest his feet on you.
He raises one eyebrow, but says that would be nice.
You sit on all fours, and Jack gratefully puts his boots up on top of you. You sit there for the rest of the night, Jack occasionally drinking or changing the channel, but you never move from your position as hit footrest.
You feel curled up and stiff, and your skin itches. You watch as short red fur grows over your skin, and you begin to change shape, becoming a large block. You try to move, but can't. Eventually Jack gets tired and turns off the television, going to bed. You see in the reflection of the black screen just a normal red footrest.
You never change back to a human, becoming just a dirty footrest, slowly becoming muddier and smellier, until you are indistinguishable from the rest of Jack's filthy, tattered furniture.