The living room.

Hank and Veevee walked quietly through their darkened house toward the sounds of sex they heard when they entered. Soon it was clear they were coming from the living room. At the end of the hall, they looked round a doorway and into the dimly lit living room.

In the center of the living room was a little platform of cushions covered with a sheet, like a mattress on the floor. Someone lay atop the platform, but Hank and Veevee couldn't see who. There were people close on each side, rubbing and touching the person in the middle. Between the central person's legs was one young man, probably college-age, who was thrusting his cock vigorously back and forth, presumably in and out of whoever was beneath him.

Hank frowned and whispered to Veevee. "That young man, is it...?"

"Yes," Veevee responded quietly. "It's Gary."

They held hands, watching their son as he fucked his unseen partner. As their eyes adjusted to the light, they could see more clearly. Gary's buttocks tensed and pressed down and in with each thrust. His panting breath became louder and more ragged. His loose balls tightened and rose toward his cock root.

Veevee squeezed her husband's hand, excited by the prospect of watching Gary come. Hank squeezed back. They smiled as they watched their son thrusting his hard cock into the person beneath him.

Gary's cock root pulsed, his balls twitched, his anus winked, and his hips quivered. He groaned loudly as he pumped come into his partner.

Hank felt a warm feeling as he watched his son's climax take him. He squeezed Veevee's hand.

Veevee squeezed back. "God, it's just like watching you from behind," Veevee said. "He's just like you when he comes."

Gary paused, not moving for a minute. Then he gently pulled back and moved aside, revealing who he'd been plowing so vigorously.

"Is that...?" Hank whispered to Veevee, squinting across the room.

"Umm..." she said, looking closely. "Yes it is!" Veevee whispered back.