"Have you ever seen your dad's cock?" Jim was painting his workbench in the basement when he heard the comment. He froze. It was Linda, his daughter Debbi's new college roommate who was spending the weekend with them. Her voice travelled through the ductwork of the old Victorian house directly from Deb's bedroom down to the cellar.
"No, I... Well I guess when I was little." Debbi fumbled her answer.
"Well, I'd sure get a peek. Your dad is hot. Wow. Make's me all tingly."
"Linda! He's my dad! Whoever gets to see their dad's cock at our age?"
"Well, me for one." Linda laughed. "Almost every day when I'm at home. Our father treated my sister and me as... well as... wife-replacements after my mother passed. And... well, I thought that since your mother's not around...maybe you and your dad...you know."
"Definitely, not!"
"So, what's your dad do, just jerk off every night?" Linda asked. Jim blushed to hear this truth spoken even though he was two floors removed from the conversation. "Boy, I feel sorry for him in that case. I know I'd sure be lending him a helping hand. If you know what I mean."
"I ... I never really thought about it." Debbi sounded pensive.
"Well, It's not like your a virgin or anything." Linda commented. That sent another shock down to Jim who listened with intense interest, and with a swelling cock. His imagination danced between images of his cock sinking into the flirtatious Linda or into his daughter Debbi. Fucking Debbi had been a recurring theme in his masturbatory fantasies for years; a taboo theme which he could never erase from his frequent jerk-off sessions. He had surrendered to that forbidden daydream years ago.
The girls then scurried about the room, opening drawers and sliding hangers about the closet, dressing for a trip to the mall. In Jim's aroused state, he rubbed his cock through his trousers and listened to the pair dressing, undressing, giggling, and kibitzing. He slid his hand inside his pants and boxers, pulling on his cock and envisioning; asses, tits, pussies, panties, nipples, He was close to an orgasm when the girls left the bedroom and came down the two flights of stairs.