"Another almost perfect thunderstorm," I muttered to myself.
I was after all alone in my third-floor family room, enjoying watching the rain and the lightning through the wall made entirely of glass. The thunder made the glass rattle.
The only way the storm could be better was if my loving daughter was still visiting. She had been here just six weeks ago and had made love to me in my storm watching chair just like she had 18 years before. I wasn't sure whether or not she was really still afraid of thunderstorms, but it made no difference to our shared pleasure.
It had been another one-off experience though, since there were no more storms before she had flown home.
I found myself stroking my hard cock as I remembered how much my daughter loved making love in front of the window during the storm.
"I'm afraid of thunderstorms, Grandpa,"
I was startled. In my reverie, I had forgotten that my 18-year-old granddaughter had arrived to spend her work term living with me. I quickly tried to stuff my hardness back into my pants, but it still swelled out the fly as my granddaughter emerged at the top of the stairs, wearing only baby doll pajamas so translucent that when the room was illuminated by another flash of lightning, I could see that her reddish-brown nipples were hard. A glance down revealed that her pubic hair was neatly trimmed in the shape of an arrow pointing straight at her clit. Maybe my baby doll was not as innocent as I had imagined.
"Do you need a hug to feel better?"
She grinned widely and skipped the few steps to the middle of the room where I sat. Just as she reached my chair, the thunder crashed particularly vigorously, causing her to jump right into my lap. There was no doubt that my bulge was pressing against her from the bottom of her perfect tight little ass in front of her quim, which I discovered was already moist.
Before I could protest and point out that the chair could fit two if they were cozy, she wriggled her hips, grinding against my tool. With a sigh she lay back, head on my shoulder.
She felt great on my lap, so slight that she seemed weightless. When I wrapped my arms around her, there was just enough meat to give her womanly curves.
"What about that hug?"
She grabbed my hands and wrapped my arms around her lithe body. My heart beat faster. She did not stop there. Her hands guided my palms to her modest but shapely breasts.
The next time she writhed, my fingers teased those hard nipples. A shudder ran through my body. Her mother had proven that it was still difficult to share my lap during a thunderstorm without sex happening.
Another boom of sound quickly followed a bright flash in the sky. That startled her, making her jump up a bit off my lap, then settle back down. This movement caused the crown of my cock to free itself fully from my pants, throbbing right against the base of her gash. Only the flimsy fabric prevented it from piercing her pussy. She let out a long, contented sigh.
Things were moving much more quickly than they had with her mother.
The storm then rumbled in the distance. Her hips twitched, teasing my cock head. Maybe, I thought, that might slow things down. Despite having fucked my daughter during two storms 18 years apart, only her daughter's eagerness stopped me from halting this incident.
A little devil on my right shoulder whispered, "She might be young, but is still experienced. She knows what she wants. Give it to her."
The only angel on my left shoulder was my granddaughter, grinning up at me.
"Are you comfortable?"
"Your cock is probably more uncomfortable than I am."
Like her mother so many years ago, as the storm subsided, she seemed to doze as we sat there. My thumbs just slowly grazed her points.
The lull passed with the loudest thunderclap yet startling us both. This time, my entire length slid along the outside of her pajama bottom.
Without a word, she reached down and gently stroked my hardness just enough to say hello. She left her hand pressed against my shaft. To do that, she had to release my left hand, which automatically slid down her firm flat belly until the top of her shorts stopped my progress.
The inevitable lightning followed just then. Her thumb flicked across my slit. One of my fingers slid into her pants, stopping just above where her clit must be.
She moaned, wriggling harder. I could feel her wetness increasing as her womanhood bumped against my hardness.
Lifting her head, she offered her lips to mine. I still was resisting enough to just lightly kiss her, but she was having none of that. Her right hand cupped the back of my neck as her tongue slid between my lips to tease my teeth. That caused my jaw to drop open enough that her tongue found mine.
"Your mother likes to kiss my nose," I sighed as she came up for breath.
Oops, that was a mistake, telling her that I had engaged in less than innocent foreplay with her mother. Fortunately, she giggled.
"Mom always has been more into foreplay than I am. I'm mainly into fucking and sucking. Which would you like first?"
"We both have too many clothes on."
"I like it that way. Most of my sex has been in the backseat of cars, or other places we might be found out. I've become expert at disrobing just enough to be able to adjust my clothing quickly."
My finger teased her well-trimmed downward arrow of pubes.
She laughed. "Oh, I see, you want to see my gardening down there. I thought these jammies would have given you a good enough look."
She paused. My nails brushed the not so bushy bush.
"Are you wondering if I did it just for you? To let you know that I'm no virgin?"
She chuckled, and linked our mouths in another tongue twisting kiss before I could reply.
The next bolt of lightning caught me by surprise. That shifted her up, and my hand down, I discovered that her clit was throbbing as much as my cock.
The thunder was silent, and the only sound was rain striking the windows. My granddaughter's hand held mine in place.
"Touch my pearl. Play with it and make me come, please, Granddad, I need it so bad."
Playing with a wet pussy had been a passion of mine for over half a century, but other than my daughter, I had very little recent opportunity to indulge. There was no way that I could resist this little pixie.
Tentatively, I gave her pearl a single bobble with my thumbnail then slid my rigid fingers inside her panties and along her slit to the entrance to her cunt. Yes, I thought of it by that point as a cunt, even though she was my kin, because she might be blood, but she was also obviously a wanton slut who wanted what I had to give. My cock throbbed in anticipation.
"Wait a second," she muttered, "let me give you more room."
