Grace cut through the water blissfully unaware of the eyes feasting on her bare bottom. The teacher's long dark hair flowed out behind her as she swam, her mind drifting pleasantly. This was her guiltiest pleasure, her naughtiest secret, and her favorite day.
Nude Day.
Every year now since she came to teach PE at Clefthill High, she snuck into the swimming annex and made this her Nude Day tradition. It was relatively safe. A group did water aerobics and there were swim lessons in the mornings, but by the afternoon, the place was locked up again, with only the other PE teachers and the janitors having keys. Of course, there was always the chance one of them could walk in, but the risk made the act all the more delicious.
Except now.
Eighteen-year-old freshly graduated Charlie gaped down at the naked woman and her perfect form as she swam through the water. Her ass was perfect, nice and juicy on her petite frame, and any time she rose up with her strokes, he could see the sides of her big breasts. Whoever she was, he didn't think she was a student, though he couldn't see her face.
"Holy shit," he whispered to himself, his cock rising in his swimming trunks.
Like her, he wasn't supposed to be there, but his father was a maintenance man for the school, and one of his duties was upkeep of the pool. Knowing that Charlie was trying to make an effort to keep the pounds off before college, he loaned his son a key to the place so Charlie could get in some laps in private.
And now here he was, staring at a completely nude woman in the school's pool, a beach towel neatly folded by the stairs leading into the water but not a stitch of clothing in sight other than that.
Too late, Charlie realized he was about to be discovered. She reached for the wall, spun, and kicked off again, her head rising. She reached out as if to start her strokes again, but before she made it more than a few feet, she floundered in the water, covering her breasts and straightening up, yelping, "Oh my God, oh shit!"
"Oh shit!" Charlie echoed, gaping at his fantastically nude dream woman.
His PE teacher, Ms. Grace Chen.
* * * * *
She pressed her body as close to the wall as possible. "Charlie, I... I..."
The eighteen-year-old had her flummoxed, and not just because she'd been caught by a former student, which could lead to potentially serious ramifications to her job. He was erect, his bulge standing tall in his blue swimming shorts. Very tall. Very fucking tall. Even as she wanted to die of embarrassment, she wanted to giggle too. When the young women in his life found out his secret, she doubted geeky Charlie was ever going to spend a Saturday alone again.
And he was a geek, but he also had her respect. She helped coach practices for the track team the year before, and Charlie, a senior, worked his ass off to some great gains. He wasn't quite fit enough to place often in his events, but if he kept slimming down and toning up, he might make it as a walk-on to his college team.
With his extra flab all but gone, Charlie approached a certain sort of youthful charm. His frizzy hair could use a trim, but his slim, long face, strong chin, and bedroom eyes would serve him well if he could ever work up the courage to ask a girl out. She would bet good money her ass and tits were the first he'd ever seen in real life. Not that there was anything wrong with that. She was older than him when she lost her virginity. But still, the idea that she had given him the thrill of his young lifetime amused her.
"I'm sorry, Ms. Chen. I didn't know, um, um, that anyone was in here. And I didn't expect..." He swallowed, his eyes roaming what little he could see of her. "...you know, um... you."
"What are you doing here?" she asked.
"My dad works for the school and takes care of this pool. That rhymes," he said, smiling weakly and looking like he might faint. "I... I come in here to exercise because Coach said swimming was really good cardio and it's my favorite way to exercise and... um... but what are you doing in here? No one's supposed to be here."
"Yeah, we're both kind of breaking the rules, aren't we?" she asked.
"You think?"
That made her laugh softly. "The truth?"
"Sure."
"Today is Nude Day. It was my favorite day in college. My roommate taught me about it, and every year, we did something dumb to celebrate it. Like we'd streak across the quad, or flash our professors or something."
"Holy shit," Charlie breathed.
"Well, okay, I had my bra on for that one but she went totally topless for it." Grace fought the urge to giggle like some brainless ditz, thinking about how wild they got. She and that same roommate had once held hands back to back as they blew six of the football team. Another time, their boyfriends took turns fucking their asses. God, she was getting turned on by this, the thrill of being caught by a student making her want to rub her thighs together.
"So... you do this because of Nude Day?" Charlie asked.
"Wh.... oh. I trailed off. Sorry." Grace unconsciously moved away from the wall, just by inches, but it was enough to show off even more of her big breasts. "Yeah. It's just a little bit of fun. I come in here every year and swim a few laps naked. It..."...excites me, she thought but didn't say. Despite the cool water against her skin, she felt flushed, and finally she was aware of her tits nearly above water, her big dark nipples visible under the surface. "Oops."
"I... I won't tell."
Grace expected a "if you let me see you naked" or "if you blow me or fuck me" but Charlie didn't say any of those things. He just stared, his hands twitching against his hips as though he wanted to jerk his big cock.
"Thank you," she murmured. "I'd better get out now."
"Oh, uh, I'll turn around, or, or, or go in the men's locker room or..."
Grace thought about it. Despite his words, that he would tell his friends was a certainty. He might be eighteen and soon to be a college freshman, but he was still a teenager and she had no doubt he wouldn't last the night before he was on the phone with his two best friends telling them about seeing their hottest teacher naked. But there was no way in hell they would believe him, and even if they did, who in turn would believe the three of them?
"You've already seen most of me anyways, Charlie. Might as well get the whole show... if you won't tell anyone?" she asked, pouting her lips. She knew the power those lips had. Her slim hips, tight athletic ass, and big breasts had a lot of power, but it was her face that ruled over men, her big doe eyes, her dark lashes and thick eyebrows, her pouty full lips, her delicate features. Her PE classes were always filled with guys looking to ogle her all year long.
"I... I won't tell," Charlie said. "Are you really going to let me see you, uh...?"
"Naked?" she asked. She moved back towards the wall and held up a hand. "Help me?"
"Holy shit," Charlie squeaked. He gripped her by the forearm, and as she pushed upward, he pulled, bringing her up and out of the pool. Water cascaded down her body, gleaming on her curvy breasts and her taut thighs. He gaped at the thin strip of black pubic hair leading to her thick pink pussy lips. His huge eyes slowly moved upward across her body, at her pubic mound, her trim belly, her big breasts with the slightly upturned nipples. These he stared at for a long, long time, and Grace found she did not mind, not one bit, her chest rising and falling, her need starting to burn inside her.
So when the eighteen-year-old moved towards her haltingly, she moved for him too, hand going to his cock through his shorts, her other on his chest, not quite lean but definitely getting there. He whispered it one more time -- "Holy-" -- before her lips met his, tongue sliding between his lips.
Charlie froze, his eyes huge, his hands and arms stiff at his sides. If he even breathed, she wasn't aware of it. She took the initiative, moving her hands to his and bringing one around to her ass and the other to one of her breasts. He gave her tit a tentative squeeze, and moaned, "So soft, and... and..."
"Shut up and kiss me," she growled, and her student did just that. Instinct took over for the eighteen-year-old and his hands began to work in earnest, roaming her breast, squeezing her ass and pulling his hot teacher against him. His cock was pinned between them between their bellies, his hips beginning to rock upward like he was trying to fuck her stomach.
His kisses were overeager and unpracticed, but some other woman could teach him how to do it properly. She wanted him like this, raw, inexperienced, ready to fucking explode from her touches. It was undeniably hot to have a virgin melting at her fingertips, a former student of hers, so fucking taboo she would be thrown out of her job and the community if anyone could ever prove this. It was dangerous, but on this day of all days, she wanted it to be that way.
Slowly she began sidestepping with him, feeling with her foot both for the edge of the pool and her towel. She brushed up against the material and broke away from Charlie, his lips still trying to chase hers.
"Stay right there, just like that," Grace said.
"But..."
"Trust me."