It was a gorgeous summer day -- perfect to while away a few hours at the beach. The sky was cloudless, the high temperature was going to be 93 degrees (F), and there was a gentle breeze, just enough to keep the air from being stagnant while not being an annoying wind. I showered, put on my swimsuit, applied suntan lotion to all my exposed skin, and tossed my beach towel over my shoulder. I'm lucky enough to live a ten-minute walk from the beach. By the time I'd finished prepping, it was just a few minutes past noon.

[12:17 p.m.]

I descended the well-worn trail down the 30-foot-high rocky ledge that separated the beach from the coast, took a deep breath of the air and started looking for a place to settle. I saw a boy, whom I estimated to be about nine years old, frowning as he tried to construct a sandcastle. A woman lying on an enormous blanket near him was watching him closely. I walked over and dropped into a crouch to speak with the boy.

"Howdy," I said. "I'm Jake. Having some trouble?"

"I'm Tim," he replied. "Yeah, I am. I want it to look like this." He pulled his phone out of the pocket of his shorts and showed me a few pictures.

"I see the problem, pardner," I responded. "You can't do this with sand alone. Let's get some structural reinforcements." We walked about 20 feet to the high-tide line, the woman watching us like a hawk, and I collected some sticks of driftwood and fragments of seashell while Tim got a fresh bucket of damp sand. We walked back to our starting spot, and I placed driftwood upright in certain locations. For the next 30 minutes or so we worked on the castle -- Tim doing most of the labor while I supervised and helped shape things. Finally, I placed the fragments of seashell on top in positions so that they resembled battlements.

"That looks perfect," Tim grinned. He pulled out his phone and took about ten pictures of the castle from several different angles.

"Glad I could help, pardner," I said. "You did all the work: I merely came up with the design." We exchanged a high-five.

"You should thank Jake by inviting him to share lunch with us," the woman on the blanket interjected. "Your mom always packs enough food for a small army."

"Okay, Aunt Cathy," Tim replied. He turned to me. "Want to join us for lunch?"

"I'd love it, pardner." Tim and I walked over to where the waves were breaking to rinse the sand off our hands. By the time we got back, Cathy had unpacked a dozen assorted sandwiches, six 12-oz. bottles of water, a large Tupperware container containing sliced fruit, another Tupperware container containing cut-up vegetables, and an entire unopened package of Oreo cookies from a ginormous picnic basket. The food was in the middle of her monstrous blanket, and there was plenty of room for the three of us on the perimeter.

[12:55 p.m.]

We all grabbed a sandwich and began eating. For about the next two hours, except for a brief break at 2:30 when we all used the public restroom, we lay on the blanket, ate, sipped water, and chatted. Tim and I carried the conversation, but Cathy contributed her share as well.

They learned that I was 21 years old, a third-year student at the local college, and studying to be a structural engineer. Helping Tim construct the sandcastle was an excellent practical test of my theoretical knowledge. I had dated off and on, and had one girlfriend my first year of college with whom things had gotten serious (meaning she dragged me into her bed and banged me twice a week for about six months), but she had left the state after that year due to a family crisis and had dropped out of college to help take care of a severely ill relative.

Tim was ten years old, mildly autistic, and his special interests were medieval castles and constructing things. (So he and I had a natural shared conversation topic.) He was the lone child of Cathy's 34-year-old older brother Robert. Robert had a 9-5 job at the local branch of a large multinational company as an IT tech. He was in fact supposed to be the one to take Tim to the beach today, but at 6 a.m. a Very Important Client had called asking for him by name to fix a Very Urgent Problem. They were more than willing to pay him quadruple his normal hourly rate for making him work overtime and on a weekend.

Cathy was 27 years old, born infertile due to a genetic mutation, and worked as a receptionist at a local company. Every other Sunday, she would come over and spend the afternoon and evening with her nephew and her brother. Since Robert's wife -- Tim's mom -- was extremely sensitive to sunlight, and Cathy was very familiar with Tim because of the every-two-week visits, it was only natural that she was drafted as an impromptu replacement to take Tim to the beach. Being autistic, Tim didn't handle changes very well, and this was the least burdensome change to make. They were scheduled to leave the beach at 3:00.

[2:52 p.m.]

"We'd better pack the basket back up," Cathy said. Between the three of us, we had eaten half the sandwiches, consumed four bottles of water (Tim had drunk two), made a dent in the fruit and vegetables, and eaten about a third of the cookies. We all pitched in and got the basket re-packed in four minutes.

[2:56 p.m.]

Just as we were putting the last item in the basket, we looked up to see a tall man wearing a business suit, standing out amongst all the beachgoers in bathing suits, striding rapidly towards us. Tim jumped to his feet as the man reached the blanket. "Dad!"

Robert, for it was he, dropped down to give his son a hug. "I'm sorry I missed the beach outing, but I wasn't about to miss spending the afternoon with you and your amazing mother playing board games and listening to our favorite music. Did you have a good time?"

"I sure did, Dad. Jake here helped me build a lovely sandcastle -- I took pictures -- so we offered to share our lunch with him."

I gave Robert a smile and a small wave. "It was a pleasure to help out such a sweet boy."

Robert snagged the picnic basket, then turned to his sister. "Thanks for stepping up, sis. See you in eight days."

"Gladly." Cathy waved at her nephew and brother as they turned to walk away. After they had disappeared back up the path to the coast, she turned her focus to me.

[3:00 p.m.]

"I owe you a huge debt of thanks," Cathy said. "Tim looked like he was heading towards an autistic meltdown and then you came along. He was really getting frustrated not being able to make the castle look right."

I shrugged. "I'm just glad I could help."

Cathy grinned. "So modest. Without you this would have been an awful day. I know just how to thank you properly. Follow me."

She got off her huge blanket and picked it up. I slung my beach towel over my shoulder and followed her. We walked about 150 yards to a spot where the rocky cliff separating the beach from the coast made an "S" curve. We were well away from the rest of the beachgoers, and there was a rock overhang after we walked around the first part of the "S" that created a shadowed alcove on the beach. Cathy lay her giant blanket down on the sand. "I learned about this place when I was in college. I was single, unattached and wild, along with three of my female friends. We invited four boys back here one evening for an orgy."

She removed her bikini, and I slipped out of my swimsuit. She was a strongly built, busty brunette, exactly my height (five-feet-seven), with a firm, round butt. I'm of average build, with short red hair, and my six-inch-long dick (of normal thickness) hardened at once. We lay down on the blanket.

[3:06 p.m.]

Cathy started by pulling me in for a kiss. Our first kiss was short. On our second, we parted our lips and snaked our tongues into each other's mouths. After several kisses, Cathy nudged my head downwards. I got the point and began kissing my way down to her neck. She made soft little sounds of pleasure as I found her sensitive spots.

I kept going downwards, and soon I was kissing my way through her cleavage. Her arms wrapped around my head. I trailed my tongue slowly through the valley between her breasts, several times. Then I lifted her right breast up and kissed the base of it before moving up in a helix of kisses towards her nipple. I repeated the process with her left breast. At that point, I opened my mouth and began suckling on her nipple. She shivered and pressed herself more closely against me. I lightly caressed her other breast and tweaked that nipple between my fingertips. She made soft, quiet sounds of pleasure, clearly trying not to be so loud that we would attract attention.

I switched my mouth to her other nipple and continued gently suckling. She locked her arms around my skull, holding my head in place. "You're good with your tongue," she whispered. I alternated between her nipples for a few minutes before she repositioned me so I was lying flat on my back.

She shifted so that she could lower her pussy onto my mouth. I got the hint and began kissing along her slit. I licked up some of her leaking juices and then slid my tongue between her folds. She leaned forwards and I could feel her lips kiss the tip of my dick as she wrapped a hand around it.

I lifted my arms up to grope her well-muscled butt as I tongued her box. She made muffled sounds of pleasure as she slipped her lips over the head of my cock and began licking the tip, tracing erotic patterns with her tongue. I slid my own tongue deeper inside her love-cave. She pressed her body downwards and locked her thighs around my head. I began using a circular motion with my tongue. She responded by sliding her mouth down a bit farther and using her tongue to trace circles around my shaft. I drove my tongue as far as I could get it inside her and sped it up, lapping her flowing juices. She shivered through an orgasm, flooding my face. I continued tongue-fucking her, and she opened her mouth wider and began taking my entire length in her mouth, bobbing her head up and down and licking all along my pole. I groped her butt more firmly and continued lapping at her pussy and was quickly rewarded when her second orgasm hit.

Cathy climbed off my face and slid her pussy down onto my dick. I gave her a smile as she began bouncing steadily up and down on me. She leaned her torso forwards so I could kiss and suck on her breasts as she rode me. I also gripped her rump firmly and helped bounce her up and down. She moved with a smooth rhythm, never racing but moving fast enough to bring her towards another orgasm. I began thrusting my rod upwards into her, moving my hips to match hers. She quickly climaxed again, and I could feel her locking her jaw to avoid screaming lustfully. As it was, she let out a whispered moan that was sexier than if she had roared out her lust. I continued to make love to her, and now every time she slid downwards, her pussy was giving my rod a squeeze. She wrapped her arms around me, securing my face against her chest and making any sounds I made muffled through her nipple in my mouth. I flicked my tongue over it and she began building again. Within a few minutes she shivered through yet another climax.

I was getting quite close, myself, so Cathy climbed off me, spread my legs, got between them and wrapped her breasts around my throbbing dick. I got the hint and began thrusting upwards through her cleavage. "I love having a hard dick between my tits," Cathy murmured. I smiled at her and continued to smoothly thrust up and down. She put her hands on the sides of her breasts so as to squeeze them more firmly around my cock. My rod throbbed and twitched with excitement. Cathy let out a series of low, lustful whimpers. I sped up my thrusting, enjoying the tunnel between her breasts almost as much as I had enjoyed the one between her legs. She locked her eyes on my pole and licked her lips. That was enough to set me off, and my cum reached her neck with the first shot before slowing down and ending up on her upper chest and dripping down through her cleavage. She smiled and rubbed it into her skin, then lay down and placed her head on my chest. We both dozed for a bit to sleep off our orgasms.

[4:48 p.m.]

Cathy and I stirred back to life. After taking a moment to turn my brain fully back on, I whispered. "Thanks a lot, gorgeous. That was a very pleasant and unexpected reward. I wouldn't mind pleasuring you again some time."

She climbed to her feet and retrieved her bikini, putting it back on. "I don't think my boyfriend would like that."

She hadn't mentioned a boyfriend in the entire two hours of conversation during lunch. I must have had a puzzled look on my face.

"This was a one-time special," she said, keeping her voice low. I pulled my swimsuit back on and retrieved my towel. "He's a wildfire firefighter," she explained. She and I moved off her blanket so she could pick it up. "That being said, you did a good job making my body happy. There are some unattached ladies at my workplace." She produced a phone from somewhere within her huge blanket. "If you give me your information, I'll let them know you're available."

I gave her my information and she entered it. We walked out of the alcove and went our separate ways. It had been a good day at the beach.