A therapeutic cushioning assembly and method. The assemble provides structural support to a user's buttocks and spine while the user rests in a sitting position for a prolonged period of time. The cushioning assembly provides a firm rectangular cushion and a firm circular cushion comprising a high-density foam. The cushions detachably mate in a perpendicular disposition via magnets within the cushions. The position of the rectangular cushion and circular cushion can be rearranged to provide support for either the buttocks or spine, depending on the dimensions and comfort of the user.