Andy had been berating himself for days, but whatever he did, he couldn't get the thought or picture of his two teenage daughters playing about on his bed with his late wife's vibrator out of his head.
Just this morning during his shower the mental picture of Lucy's dribbling pussy had leapt into his head and he had reached for his swollen cock, quietly muttering her name as he brought himself off. How he would have loved for her to walk in as he masturbated, loved to shown his sweet young daughter his manhood, loved for her to touch it, kiss it, suck it.
Now the girls were out, shopping with friends and he was in Jenny's bedroom. The top drawer of her bed-side table was open and before him were several pairs of different coloured panties of all description, lace, cotton, hi-leg, thongs, a myriad of size 12 underwear that he was now rummaging through. He pulled out a very small lace white thong, which it seemed would be hardly worth wearing. He imagined it fitting tightly around & up Jenny's arse, the small strand of material hugging her virgin pussy. He held it to his face, kissing the gusset, thinking about doing that whilst she wore it. He moved his hand up and down his erect cock, feeling the silkiness of a pair of Lucy's panties which were wound around his left hand.
His thoughts ran wild in his head as he thought about the two girls and once again he was soon ejaculating, his cum oozing through his fingers onto Lucy's panties.
As soon as the moment of pleasure had passed, Andy felt sick again. He was turning into a pervert, with carnal thoughts that should be reserved for women his own age, not teenage girls who were products of that seed he was spilling.
He quickly put Jenny's knickers back in the drawer and did the same with Lucy's, but he knew that he wouldn't be able to resist going back.
After he had caught the girls in his bedroom, there had been a lot of tension for a day or two in the house, but that had soon worn off as they got back to their usual routine and the girls had acted as if nothing had happened. However this was making matters worse. Lucy especially had, for many years, moved about the house with very little on sometimes. For a couple of days after his discovery, she had been very guarded, but being a typical teenage girl, that had soon slipped and a couple of times since, Andy had spotted her coming out of the bathroom with just a pair of knickers on & a bra. Her slim body, small tits and tiny panties stretched over her tight little arse were just fuelling the fire inside and often when she was out he just lay on her bed wanking himself off using her and her sister's underwear as tools for this.
Two weeks after he had caught them in his bedroom, Andy sat in the lounge watching the news on TV. Over those two weeks he had probably masturbated twice a day thinking about his daughters, the last one just a couple of hours earlier. Now the girls were upstairs in their rooms and all was quiet. It was unusual for them both to be in of an evening, usually one or both were out with friends, but after dinner, both had said they had work to do for their degree courses and all had been quiet since.
Andy was just about to get up and make himself a coffee, when the lounge door opened and both girls walked in, Lucy looking very sheepish following Jenny who had the determined look of her mother on her face.
"Hi girls, okay? I was just about to make some coffee, want some?"
"No, we don't," said Jenny, "We need to talk."
It sounded very ominous to Andy and he eased himself back into his armchair, whilst Jenny and Lucy sat down on the sofa.
He looked at the girls, something was up and he felt his stomach turn to water. He licked his lips before asking, "So talk about what?"
From the pocket of her jeans, Jenny produced a pair of pale blue, lace panties.
"Recognise these?" She quickly turned to Lucy who handed her another pair of knickers, lacy & red, "or maybe these?"
He certainly did, just two hours previous he had been in Jenny's bedroom, wanking over both pairs. He gulped and licked his lips again but couldn't seem to speak.
"Well we think you do recognise them Daddy dear. Why you ask. Well I'll tell you, because for weeks I have suspected that someone has been going through my underwear and not only that a few stains have appeared here and there and guess what the same thing has been happening to Lucy's knickers too. So not being stupid I put two and two together and came up with a plan and hey whilst Lucy and I were at Uni today, that plan was in progress. I devised a little trap to see if our suspicions were right and that trap was sprung, by who do we think?"
Jenny put her finger to her mouth and looked around the room mockingly as she continued.
"Mmmm I wonder who the suspects might be. I wonder who has been going into our rooms and taking our underwear and then leaving little semen stains in them. I wonder."
She looked at Lucy,
"Who do you think Lucy, is it our neighbours, maybe the postman perhaps, letting himself in and rubbing his puny little cock over our underwear, what do you think Lucy, got to be some pervert like that surely?
Lucy just went red and looked down.
"But no my little trap couldn't be sprung by them, how would they get in. No it had to be someone else living in this house and then TA DA!" she said pointing her finger in the air "I had a brain wave, it must be Daddy. Who else could have been doing that for weeks? Who was it who made a mess of his trousers when he caught his daughter with her knickers down? Only Daddy. Daddy has been going into his little girls' rooms and playing with his puny little penis, getting himself off over his own daughters, HASN'T HE?"
The last two words were virtually shouted in his face as Jenny leaned forward.
Andy wanted to run out of the room, he felt ashamed and embarrassed and physically sick. He was still at a loss for words, what could he say in his defence? Nothing! He had been caught out and was at the mercy of his daughters.
Jenny leaned forward "Anything to say? Any explanation you would like to give?"
"I'm sorry." It seemed the most appropriate thing to say at that point.
"Sorry, Mmmmm interesting," Jenny said mockingly.
