The wooden floor creaks under the weight of their secret tryst. The siblings, entwined in the dim light, their bodies slick with sweat, push against each other, their movements echoing the rhythm of their racing hearts. Michelle's fingers trace the length of her brother's cock, her touch feather-light yet electric, sending shivers down his spine. He groans, his hands finding her breasts, squeezing them, his thumbs brushing against her hard nipples. Their bodies move in sync, their breaths coming in short gasps, as they surrender to the forbidden pleasure they've both been denying.