I felt Sarah lift the towel slightly from over my backside and I gently rolled onto my back away from her. I noticed her looking up and to one side in... a professional looking manner to spare me further embarrassment but noticed her willpower fail as her eyes darted to my crotch and away again, so fast that I only just saw it happen. As I straightened up and got myself comfortable I could see my dick pointing skyward and indeed as swollen as it can get, the foreskin stretched back a little so. ?Well, you will have to be a good boy and take a butt plug first. Do you know what a butt plug is?? His eyes widened and he nodded his head yes. ?Well then, here you go.? I inserted the butt plug and stood up waiting for it to fall back out. ?What the fuck? You are hopeless! You can’t even keep a small butt plug in your ass? I can’t let you out of those chains then. I guess you will just have to stay there all night.? He shook his head no urgently.I walked away pretending not to hear. We also compared notes on how many times and how we did it at home and any place else we got a chance to get some relief from the constant hard-ons we were getting. But that was all we were doing and never did anything together. To actually see a live asshole gaping open was something I never saw before. My boy cock was now fully hard and making a tent in my pants. I couldn’t resist, I pulled out my 6” uncut cock and slowly started to stroke it.The more I stared at Gramp’s gaping hole, the more. Her late husband was so passionate which left her with an empty resilience. Like so many working women she led a busy life, which at least helped keep her mind away from all the bad thongs that had happened to her. Of course she had the charisma with which she could charm any guy to her fold. But that was never enough, she could not consent to casual relationships or one night stands simply to satisfy her sexual pulls. She needed a lot more than that, she could get that when she used her.