Mio, my wife's sister, stays at our house for two days and casually lounges around in her panties. I try to look away, but the obscene, plump outline of her pussy through the fabric destroys my self-control. I finally give in and fuck her morning, noon, and night—even in the bath, while my wife is nearby, and while she sleeps. Packed with revealing panty angles, relentless lust-driven pounding, and close looks at Mio's irresistibly soft pussy, this affair pushes him to the point of not caring whether his marriage survives.