It had been a couple of weeks since my daughter and I had introduced my granddaughter to the joys of my cock and here I was back at their house just finishing up fixing their garage door which she had managed to back her car into yesterday, dragging it off its rollers.
"All fixed, Dad?" Sam asked coming out into the garage.
"Almost," I replied not looking up from my job as I greased the last few rollers whilst perched on a small ladder to reach.
"Thanks so much, I can't really go out with the door wide open can I," she continued.
Before I could reply I felt her hand on my crotch, stroking my cock through my jeans. "Now how can I properly thank you?" She purred up at me.
I looked down at my daughter's face smiling back up at me. "Do you have time for a proper thank you?" I asked. "Don't you have an appointment to get to?"
"I do, yes," she replied. "But I don't want you to go unrewarded for all your efforts this morning."
My cock was solid under her hand and I felt her give me a squeeze. "When I get back maybe?" She said, looking more than a little disappointed.
"Invite me for lunch and I'll still be here when you get back then," I said, helpfully.
A huge grin swept her face. "Stay for lunch daddy?"
"I'd love to Sam, I've nothing on today."
Her fingers moved to the zip on my jeans pulling it down and deftly popping the waistband button. Her hand quickly dived into my jocks and returned with my engorged cock wrapped in her fingers. "Hmmm, just a pre lunch taste," she said taking me into her mouth.
"Fuck Sam, I'm on a ladder here!" I chastised her.
She gazed up at me with her mouth full of my cock, bobbing her head to take me down her throat without looking away. She held me there for a moment before the need to breathe meant she had to release me.
Gagging and spitting she said, "I want you cock daddy!"
She licked my shaft and sucked up all the droll she had left on me. "So good."
With that she tried to return my cock to my jocks', but it wasn't going to happen up a ladder. Giggling she said. "You'll have to put yourself away daddy, sorry."
I stepped down and finished tucking my cock back into my pants and straightened my shirt.
"I have to go," Sam said stepping into me and pressing her mouth to mine. She kissed me hard and I allowed her tongue to slip into my mouth as my hand grabbed her ass and pulled her tight in against me.
We broke apart, her face all flushed and her eyes wanton. She smiled and turned away. "See you later, must dash." I watched her ass sway as she walked back inside.
Ten minutes later I had just finished, and I heard her yell out she was leaving. Her V8 Jeep burbled into life and she was gone, a whirlwind of energy my daughter.
I packed away my tools into my car and figured I needed a shower if I was staying for lunch so headed inside. Sam's bedroom had an en-suite at the back of the house, so I picked up a water from the fridge and headed upstairs.
As I got to the top of the stairs my granddaughter Maddie yelled out to me from the spare bedroom where the family computer was. "Granddad Nick!"
"Yes sweetheart?" I answered as I pushed opened the door and walked in.
"This dam computer keeps freezing on me," she said looking cross at me as if that'd make it work properly.
I looked at her sitting in her chair, a spitting image of her mum. She was nearly 19 years old, with longish blonde hair. Today she was wearing a tight-fitting White top that clearly showed off that her breasts weren't encased in any bra, and a dark Blue short skirt.
I looked over her shoulder pretending to look at the computer screen, while secretly staring at where her shirt finished on her lap. Sam and I had agreed that post our fuck fest, nothing further could happen between Maddie and I if she wasn't present and of course only if Maddie was so inclined to join in.
Even though I knew it was wrong for me to try to peek up Maddie's short skirt given my agreement with her mum, there was no harm in looking I thought. Looking over her shoulder it was apparent that I couldn't really see anything, so I gave up pretending and said to her. "Okay, let me sit down and try to work out why it's not working properly."
Maddie stood up and as she did so, the chair rolled backwards and I sat myself down in it, preparing to have a look at the computer. However, instead of moving away from the computer desk, Maddie surprised me by dropping herself down onto my lap.
"I'm heavy, aren't I granddad?" she said giggling.
Feeling my cock squashed against my thigh inside my underpants by her cute arse, it took me a moment or two to answer her.
"Just a little." I laughed, holding her by the hips.
Not wanting her to move, I learned around her with my right hand and took hold of the computer mouse and began to work out why it'd frozen on her.
Maddie made no attempt to remove her arse off my cock and knowing that only the thinnest of material was now separating my cock and her naked vagina, I felt it starting to respond to the sensual weight of her arse.
Try as I might, there was no way in hell that I could stop my cock from becoming fully erect under her. I willed my attention to focus on the computer, and not her arse pressing against my cock, but to no avail. As my cock swelled to its full length, I knew full well that she had to have felt it growing beneath her.
Maddie however, she stayed right where she was, and I wondered why that was.
I'd kept my left hand still on her left hip, but I really wanted to reach upwards and cup her breasts but was doing a great job talking myself out of it as I remembered what Sam and I had agreed.
I was taking my time sorting out the problem on the computer because I didn't want to break the spell that was my granddaughter sitting on my lap with my rock hard cock bare millimetres from her pussy, stopped only by the thinnest of fabrics in whatever choice of panty she was wearing today.
"This is the reason why it's playing up, Maddie." I told her after a few more minutes of time wasting, pointing with the cursor at what had caused the problem, knowing as I did so, that this wonderful position I'd found myself in, was about to end.
"Thanks grandad," she replied getting up from my lap. This freed my cock for a breather, but it was now pointing straight up towards her cute little ass.
Instead of moving away from in front of me to allow me to get up from the chair, Maddie surprised me by leaning forward onto the desktop and staring at the computer screen.
"Oh, now I see," she said. "I'll try and remember that for next time it happens."
Because of the way she was now leaning across the desk I had a clear and uninterrupted view up her short skirt, and instead of seeing an expanse of white or pink panty covering her ass what I got was a bright red strip running between her ass cheeks. Holy fuck, my granddaughter was wearing a tiny thong.
My eyes drilled into her ass and I thought that I could see some dampness on the crotch of her thong but wasn't quite sure if I was seeing things properly.
"Yes, we'll turn you into a computer wizard before too long aye," I replied staring intently at her crotch, and wishing that the thin piece of material stopping me from seeing her vagina would just disappear.
I was about to get up from the chair so that she could again sit down in it when Maddie surprised me again by placing herself back down onto my lap. This time however, her thighs were either side of my left leg so that her entire panty covered vagina was pressing right along the stiff shaft of my cock.
This was no mistake; Maddie had done this quite purposely.
"Am I too heavy, granddad?" Maddie asked me, looking at me over her right shoulder.
She had a smile on her face that told me that she knew full well that she was sitting right on top of my stiff cock.
"No young lady, I'd say that you were just about the right weight," I replied, smiling back at her and not quite believing that this was actually happening, but knowing it couldn't continue without Sam being here to make things right.
"Good," she replied, turning to look at the computer screen once more.
I could feel the intense heat coming from within her pussy as it covered the top of my shaft beneath her. I twitched my cock beneath her, and Maddie gave out a small giggle.
"What's the matter, Maddie?" I asked, knowing full well why she'd giggled.
"Nothing granddad," she replied without turning her head towards me.
I twitched it a couple more times, each time causing Maddie to giggle then, I upped the ante when I placed my hands on either side of her hips and rocked her back and forward slightly knowing my cock would be dragging across her cunt lips. I could feel her thigh muscles trembling slightly, either side of my leg.
Maddie leaned forward, keeping her pussy pressed firmly against my stiff cock and she began to go to different sites on the internet as if nothing unusual was going on between us.
I twitched myself against her crotch a few more times, just to let her know that I knew what was going on. Then, I felt Maddie's hips begin to gently and slowly rock back and forth in response to my rocking, further increasing the friction on her cunt. Fuck me I thought, my granddaughter was starting to get herself off on top of my cock.
As we continued to both rock in the chair and because I still had both of my hands on her hips, I could feel her breathing start to quicken noticeably and as her sexual tensions grew, so did her movements along the shaft of my cock.
I could feel some wetness seeping from within her onto me, soaking my leg with her juices. God, what I'd give right now to have been buried to the hilt inside her.
"Grandad?" She said.
"Yes sweetie," I replied.
"Before mummy left just now she told me to make sure I thanked you properly for fixing the garage door."
