18-year-old Bobby held his 65-year-old Grandpa's erect penis in his hand. He marveled at how his elderly Grandpa could achieve an erection at his age, and so did Grandpa since this was his first time achieving an erection in what felt to him like ages. He bent Grandpa's dick forward and buried his face in his bushy gray pubic hair. Grandpa moaned as his grandson munched on his whitesh-gray pubes while he held on tightly to his dick. He ran his arthritic fingers slowly and somewhat achingly through his hair as Bobby pulled and nibbled on his crotch hair as he stroked his Grandpa's cock. Bobby lifted his head and stared down at Grandpa's swelled cockhead that was staring him right in the face. He opened his mouth as wide as he could and went down on his beloved Grandpa.
Though Grandpa's dick had shrunk in size through the years the older he got, making his grandson's cock seem massive by comparison, he was still able to fill his grandson's mouth with his aged tool. And though this was Bobby's first time at giving another man head, he sucked his Grandpa's dick like a pro. Grandpa watched proudly as his grandson's head bobbed up and down on his prick. Bobby fisted the bottom part of Grandpa's shaft as he kept sucking him off, the side of his hand slapping Grandpa's dangling balls, which caused Grandpa to moan out each time he felt the side of Bobby's hand hitting his nuts. But Grandpa didn't complain. He enjoyed what his grandson was doing to him, the immense pleasure he was giving his Grandpa. He only hoped that, when his turn came, that he could give Bobby as much pleasure, if not more, as he was giving him now. Grandpa knew he was being selfish, but he wanted more from Bobby before he blew his load completey, so he suggested to his grandson with his dick still buried in his mouth, "Why don't you stand up and let your old Grandpa fuck you in the ass, Bobby?"
Bobby, with some reluctance, removed his mouth from off his Grandpa's dick and looked up at him, the eagerness in his eyes clearly showing at the prospect of allowing his Grandpa to fuck him in the ass. So he took his hand off his dick and stood up. Bobby turned his back to him as he stood over him and slowly bent down towards his cock. Grandpa, as steady as he could, aimed the head of his prick at his grandson's waiting asshole. Bobby placed his hands on Grandpa's legs and bent down even further until he began to feel Grandpa's flushed cockhead poking his tight hairy hole. Bobby sat down on his cock and let out a tiny wail as he felt Grandpa's cock sliding into his asshole.
Bobby mounted Grandpa.
Bobby fastly moved his pelvis up and down so Grandpa's dick could slide easily in and out of his ass. Grandpa would've liked to move his own pelvis up and down so his dick would slide in farther into his grandson's ass, but he found his arthritis prevented him from doing so. However, regardless of Grandpa's disappointment at the limitations of his old age, Bobby seemed to be enjoying himself immensely at having his own Grandpa's dick buried all the way inside his ass as he moaned and groaned in sheer ecstasy as he gripped Grandpa's legs while Grandpa fucked his grandson's virgin ass. While his grandson was still riding him like a horse, Grandpa soon felt something that he hadn't felt in a very long time, not since his beloved wife, Bobby's grandmother, passed away some years ago: he felt the beginnings of an incredible orgasm building up in the back of his legs. He knew he was about to blow his load, and right in his grandson's ass too! The immense sensations Grandpa was feeling in his legs soon moved up to his groin through his engorged balls all the way up his shaft to the swollen head of his cock. He threw his head back as he wrapped his arthritic fingers around Bobby's hips. He closed his eyes and waited for the inevitable. In a matter of seconds, he blew his load right into his grandson's sphincter.