Guttural moans spill from her throat as he pins her thick thighs apart and slams home. The red thong digs into her ass with every deep stroke, her spine arching off the sheets while his balls slap against her slick pussy. One hand grips her hip hard enough to leave marks, the other yanks her blouse open to free bouncing tits. She gasps his name between clenched teeth, nails clawing at his back as he flips her onto all fours without missing a beat. Stepmom and stepson, tangled in sweat and desperation, the mattress groaning under their wild rhythm.