The highlight of the afternoon came when Robin slipped her sweatshirt off over her head, hung her whistle on the hook beside the lifeguard's chair, and dove, slicing into the water with a small graceful splash. My eyes followed her as she crossed the pool under the water and emerged spectacularly on the other side, swinging her hair out of her face and springing up the ladder, casually sliding one finger under the edge of her red lifeguard's suit and pulling the elastic out of some young wet female crevice.

Robin has the body of a goddess: long tan legs, a perfect curve of stomach above swimmer's thighs, marvelous round breasts, and a sharp intelligent face. And, as my conscience had had to remind me every day since the pool opened that summer, she was still in high school.

"Cradle robber," whispered Pat from the pool chair beside me, "you're devouring that poor innocent thing with your eyes, you know." Basking in the sun, big breasts barely covered, her stomach tight and swelling, four months pregnant and utterly radiant, Pat was a vision herself. I just grinned, and tried to keep my eyes from drifting back to the curvy underage lifeguard. "Shreeeee," went Robin's whistle, "No running!" She swung back into her chair, her body dripping, the taut globes of her ass moving beautifully.

"You're really suffering, aren't you?" Pat grinned.

"I'll survive," I answered, and leaned over and kissed her warmly on the mouth. Her lips were soft and perfect. I slid one hand down over her abdomen, indulging myself in the solid promising bulge of her womb. She slapped my hand fondly away as it began to dive lower.

The next afternoon Pat and I went to the pool again, and we were joined by Julie, Pat's younger sister, a slim and graceful twenty-one-year-old in a blue bikini. The girls exchanged a few significant glances and giggles, but I was used to that. I tried not to stare at Robin, jiggling in her tight red suit, any more than usual.

It got near closing time, but Pat and Julie made no move to leave. The place began to empty out, and finally when even the last of the stragglers had left, the girls got up. I made to follow them, but Julie smiled enigmatically and put a hand on my arm. "You go in for a last little soak. We'll come back and get you." OK, I'm easy. I slipped into the cool water as Pat and Julie vanished into the women's locker room. The only other person still inside the gates was Robin, in her suit and her sweatshirt, rolling up the lane-lines and fishing debris out of the water.

I admired her, her long legs moving her efficiently around the pool, her hair up behind her head, her hands long-fingered and tan on the skimming pole. She seemed to be ignoring me, but I thought I caught a smiling sidelong glance now and then. Finally, she walked slowly toward the lockers. As she slid the sweatshirt off over her head, stretching her athletic body luxuriously, she looked back once, right into my eyes. She was on the edge of laughing.

A minute later, she came back out, and dove neatly into the pool. Her slim red-sheathed form sped through the water toward me, and she surfaced facing me. But it wasn't Robin. It was Julie, wearing Robin's red suit, her hair tied loosely up behind her head like Robin's, her face young and innocent and casual, her eyes looking at me as though I were an interesting stranger. So Julie's a model; she can act, too.

"Excuse me, sir," she said politely, stroking efficiently over to me and hanging onto the side next to me, "the pool is closed now."

"Oh, sorry," I replied, admiring the drops of water on the smooth bare skin of her shoulders, "I must have dozed off."

"Oh, you can't sleep in the pool," she scolded, "that's an easy way to drown."

"Sorry, I'll watch it in the future."

"S'okay," she said casually, letting her body and her long legs float upwards and resting her head and shoulders on the wave shelf next to me. "I always take a few laps after closing, so I would've found you." We were silent for a minute; I admired her thighs and her stomach as the water lapped at them; she gazed off into the distance. "Isn't the sunset grand?" she asked. The clouds were fiery, purple, razor-sharp.

I reached over and touched the strap of the red suit where it crossed her shoulder. I slid my fingers slowly down over the tight saturated nylon, down over the Speedo logo, and up the slope of her neat round breast. She looked over at me in surprise for an instant, but then closed her eyes and let her body relax. Her breast was small and firm, cold, the nipple erect but soft. It hardened as I stroked it.

I turned to face her, her lovely small body, long legs, all stretched out floating in the water before me. The fabric over her breasts and her stomach was warm and wet and it moved as she breathed. My other hand stroked up the outside of her leg, up her strong calf and up her thigh to her hip, functional and smooth and female, bare at the edge of the high-cut suit. I took a long shuddering breath as I let my hands roam over her. Her submerged ass was tight and delicious, and when I slid my fingers along the crack between her buttocks she spread her legs and sighed. I took one breast in my right hand, and my left hand slid over the red smoothness between her legs, and I gently rubbed her mons and the tight young skin of her inner thighs.

"Ooh," she breathed, "you're getting me all hot and bothered." And suddenly she flipped herself out of my hands, pushed off from the edge with her feet, and shouted to me over her shoulder, "Beat you to the end!" I grinned and stroked off after her.

I doubt I would have beaten the real Robin, but I'm a stronger swimmer than Julie, and I pulled ahead of her, got to the wall first, and turned around. Swimming hard, her face in the water, she didn't notice me there until too late, and one slim arm bopped me on the head, and her body crashed into me. "Oh, sorry," she laughed, her legs against my sides and one arm over my shoulder, "I didn't mean to --" She stopped talking, her eyes locked on mine, the water cool and silent, surrounding us, and I put one hand behind her head, in the wetness of her hair, and drew her face to mine, and kissed her mouth, and our bodies moved together. Her thighs slid over my skin below the surface, her lips opened to me, and she pressed herself hungrily against me, her body shuddering and a low moan filling her throat. We kissed for a long time, and I ran my hands over her back and her ass through the tightness of the suit, and she rubbed her pussy against my stomach, and clung to me, and slid her tongue into my mouth.