It started with my son's first girlfriend about twenty years ago, when he brought her home for the first time. Sadly, she was only 16 and very cute, so all I could do was watch her and fantasize when she looked at me and smiled. I made sure that she didn't see my body's natural responses, especially in the summer months when her young body was barely covered with her tank-tops and tight shorts.

A couple of years later when age was no longer an issue, his next girlfriend was introduced to the family. She was short, with larger breasts and just as pretty as the first, and the first words out of her mouth were, "Oh God, I just love your accent."

My wife rolled her eyes and responded, "That's what they all say," making me blush as I introduced myself.

I let my eyes briefly wander over the sexy 18 year old standing in front of me. It was the height of summer with temperatures in the high 90's, so minimal clothing was the order of the day for this delicious young thing. She wore a flimsy, black button down blouse over a lacy black bra, a short skirt that came to her mid-thigh, and strappy flat sandals showing off her pretty pink toes.

"I could listen to you all day, Jerry," she smiled as we met.

"Well, you're more than welcome to come out and help with the gardening if you get bored. I promise to talk your ears off if you like." In my mind's eye I pictured her bent over in the garden, her skirt tight on her bottom and riding up her thighs as I knelt down pulling weeds and catching a glimpse of her white cotton panties.

"Well, you kids enjoy yourselves, I've got weeds to pull." I saw something in her eyes as I felt a delightful tingle between my legs, then turned and walked away to continue my chores for the day. By the time I was back outside pulling weeds, that tingle had created a hardness that made me reach down and adjust my cock in my shorts. I knew that I would be masturbating in the shower thinking of this cute young girl...

Two weeks later Jennifer came over again to spend the day with our son. I was in the garden again and watched her as she got out of her car, spreading her legs and giving me an unexpected view of her panties stretched over her mound. As I looked up, I knew that she had deliberately taken her time getting out of her car and spreading her thighs far wider apart than necessary. Our eyes met, and a little smile played on her lips. I looked away, blushing, once again feeling that delicious tingle in my groin.

"Hi Jerry, still battling those weeds, huh?" she had taken a few steps to stand beside me, a little closer than she should, and I could smell her delicate perfume as I slowly looked up at her.

"Hello Jennifer, you're looking lovely on this fine summer day," I smiled up at her, and caught her quick glance down at my shorts where the outline of my semi-hard cock pressed against the light material. My blush deepened.

"Thank you," she bit her lip and looked me in the eye again, "It's always nice to have a good looking man tell me he likes how I look." She was wearing a fairly tight tee-shirt which showed off her pert breasts nicely, and I could see the hint of an outline of her nipples and areolae.

For a few moments, I visualized her slowly pulling her tee-shirt up to release her naked breasts for me to feast on, and my cock grew a little harder, the bulge in my shorts a little more obvious now.

"Well, as much as I'd love to listen to that sexy accent all day, I'd better go see Kenny. He's already accused me of having a crush on you from the first time we met a couple of weeks ago." She was smiling broadly as her gaze moved lower once again, this time making sure I knew what she was looking at. "I was hoping I wasn't that obvious," she giggled.

"I should be so lucky to have a pretty young girl like you have a crush on me. I'm old enough to be your grandfather, for heaven's sake. You'd better go in before he gets any more silly ideas."

"Yeah, I guess I'm way too young for you, anyway?" She left it as a question, but I thought it wise not to answer.

"You two kids have a good time, Jennifer," I said as I turned back to the task at hand. My cock was now rock hard, and almost bent in two and I desperately needed to adjust myself.

I heard her walk away and looked up to catch a glimpse of her sexy bottom. Her skirt barely covered the rise of her buttocks as I watched her walk slowly away, her hips swaying with each step. I sighed to myself, adjusting my shorts, watching. She suddenly turned her head back and caught me with my hand on my hard cock, then smiled and winked at me before opening the door and disappearing inside.

'Oh fuck, now she thinks I was playing with myself,' I thought to myself, my face bright red, my hand still on my cock, absent-mindedly squeezing it, unable to clear the mental image of her naked legs and perfect bottom.

Thankfully, I heard the door opening and quickly removed my hand, grabbing the fork and digging the weeds with a vengeance.

"Hi, honey," my wife said, "I brought you a nice cold drink since you're such a hard worker."

I smiled to myself at her choice of words. Hard, yes definitely, as I glanced down to make sure my erection was suitably covered from view.

"Thanks, sweetie," I responded as I reached up to take the frosty glass of lager from her, and taking a long gulp. "Oh God, that was just what I needed. I should be done here in about half an hour. Would you like to go out and grab a bite later."

"Sounds like a great idea, darling," she replied, "shall I invite Kenny and Jennifer as well?"

I tried to sound as off-hand as possible. "Up to you, sweetie, I'm good either way. Just let me know what to wear - jeans and a tee, I hope," I said, smiling at her and handing her the empty glass.

"It will be really casual since Jennifer only has what she's got on."

Her comment brought my mind back to the mental image of Jennifer slowly walking away from me as I admired her delicious bottom under her skirt. My cock throbbed in my shorts, but thankfully my wife didn't notice.

"I'll be ready either way, just give me time for a shower, honey," I smiled at her, my mind still wandering and my cock hardening at my illicit thoughts....