WAAA-672 - My model stepsister keeps seducing me on set... non-stop quickies every 5-minute break

My stepsister Rin, a model, got a nude shoot, and I tagged along, only to end up as her sub for a missing male model. With my wife right there, Rin keeps pressing her curves against me, making me rock hard. 'Big brother... you're huge,' she whispers, dragging me away every 5-minute break. I couldn't resist—we ended up having quickies all day long behind my wife's back. Can you handle this little devil's seduction?