Quality time with my son

He was facing half toward me; I could see his hairy balls nestled between his legs. They were two large orbs surrounded by a fleshy sac speckled with dark brown hair. The skin was stretched over the orbs. The warmth in the room must have made them hang low between his legs, I thought.
I guess the sudden interruption and the sight of me standing there like that shocked him. He froze for fully thirty seconds, staring at the twitching movement of my hand in my pants. I knew that I should stop this perverted display of my lust; that my son would never again be able to think of me as before.
Then I gasped as he reached down and touched the purplish head of his dick. I couldn’t see it very clearly, but it was glistening from pre- come that his manipulation had coated it with. He looked into my eyes as he swirled it around the head of his dick.

Then he put his fingers around his cock and began to stroke it. I couldn’t stand the sight of him doing that, it was making my so hot I thought that I might faint. I began to really finger myself, I pulled my pants all the way down to my ankles and inserted one finger into my cunt and began to really finger myself hard, another moan of pleasure escaped my lips. “Adam,” was all I said.
He turned fully toward me and stood up, his shorts around his ankles. His hard cock stuck straight out at me, framed by a mass of pubic hair.
He stood open-mouthed, staring at me, at my fingers that I kept rubbing myself with even though I knew it was so very very wrong.