Robert had been fucking his father for at least 10 minutes, their excitement heightened by having so many people watching and clapping and cheering while the male party guests stood in a long line and masturbated in front of the ladies but with their eyes focused on Ian and Robert. Everybody present at Lucy's and Arthur's Silver Wedding anniversary party was naked and, of course, they were all consenting adults over the age of 18.
Robert was starting to break out into a sweat, his face a mask of concentration as he pressed his now experienced prick into Ian's asshole as Ian toyed with his own hard dick through his spread legs.
"You're making your dad cum, Robert," shouted Fiona, Ian's mother and Robert's grandmother, "keep it up."
"Yeah and Robert ain't far off cumming neither, by the look of things," said Tom, Ian's father and Robert's grandfather as he and Fiona moved in a little closer to get a better look at the incestuous penetration. Robert was determined to give Ian a star quality fucking as they put on the best show they could for the rest of the assembled party guests and, judging by all the clapping and cheering, they were succeeding in doing so.
Everybody was now in a state of high excitement as, without further ado, Robert let out a cry of triumph and, pulling out of his father, and with a quick wank of his dick, he shot the first of his porn star-like loads over Ian's still bent over ass cheeks. The clapping and cheering from the onlookers grew louder as, with his eyes shut tight and his face creased in concentration as he took aim again, Robert dumped another couple of loads on to Ian's bum which broke into little streams and began to seep into Ian's crack before running in rivulets down towards his legs.
"Fucking hell," said Fiona, "will you look at that."
"We're all looking, mom," said Karen, Ian's sister and Robert's aunt, "wouldn't have missed seeing that for the world."
"We all wouldn't have missed seeing that for the world," said David, Lucy's and Arthur's son who, with his sister Sarah, had arranged the party and selected the guests they knew had no inhibitions being seen nude as well as aroused by each other. They all agreed that socialising in the nude was just as enjoyable and important as the sex.
The feel of his son's warm spunk on his silky smooth middle-aged ass had Ian rising to his feet in front of his parents and, rocking back and forth on his sturdy legs gave a few more tugs on his dick as he prepared to empty his balls. Tom and Fiona dropped to their knees and seconds later, Ian could hold back no longer as he unleashed his first cumshot of the day over his mother and father, making sure they each got an equal helping of his rich glossy cream as he painted their faces as well as Fiona's tits and Tom's chest.
Even then, Ian's loads kept issuing forth and Karen and Robert were not going to be left out. Almost elbowing her parents aside, who were luxuriating in the warm spunk their much loved son had just bestowed on them, Karen likewise dropped to her knees in front of her brother as her nephew Robert knelt alongside her as they received the final few loads from Ian and he didn't disappoint. By the time his supply finished, Fiona's, Tom's and Robert's faces were completely unrecognisable while Ian's ass was also disfigured by the now rapidly congealing loads Robert had deposited a few minutes earlier.
Again Lucy's and Arthur's lounge resounded to more claps and cheers from all the other party guests as they congratulated the five members of just one of the families gathered there for putting on such a hardcore sex show for them in true exhibitionist style.
"Love you, mom and dad, love you Karen and Robert," Ian said, gazing down at the proof of his love now starting to congeal on the faces, tits and chests of his family.
"We love you too, sweetheart," said Fiona.
"That was fucking awesome," said Kevin, "such enormous father and son loads."
"Yeah, as big as ours, dad, and Jack's and Peter's," said Joe, "when we did that foursome the other day."