GENDERSWAP! A Rub in the Tub... [futa on male version]

Coach McGill eyed her young team captain as he exited the bathroom, her gaze running up and down his form as he made his way somewhat shyly over to the hot tub. The high school senior had no idea just how tightly the yellow swim team speedo was clinging to his body. The outline of his dick was obvious and his bubble butt was practically begging for a playful slap across its cheeks. Coach McGill licked her lips as the unsuspecting femboy made his way into the water. It was only thanks to the bubbling water that her own slowly swelling cock remained unseen.

"Ah, that feels really good..." Stevie said as he sank into the warm water, letting out a satisfied sigh in the process. It was only when he turned to face his coach that his face went red and he turned away in embarrassment. "Ah! Sorry, I didn't realize you-"

"What? That I was topless?" Coach McGill teased as she pushed her chest forward a little to make sure her plump breasts were visible to the short teen. Watching him squirm so soon was only serving to excite her further. "You didn't think I was going to get in here with my clothes on, did you? Besides, I doubt this is the first time you've seen a pair of boobs. I mean you're... how old are you now?"

"Erm, eighteen Coach." replied the still flustered teen.

Jackpot!

"There, you see, we're both adults here. No reason to get so flustered." Coach McGill reassured Stevie as she slip just a little closer to him. It really was his own fault for being such a little tease. The short blonde hair, those baby blue eyes, that thin line of freckles over his nose, and being shorter than the average boys made him quite the little cutie. More than a few students at school had their eyes on him, guys and girls both. Hell, even half of the faculty couldn't tear their eyes away from that cute little ass when he jogged past during practice. Of course the innocent senior was completely oblivious to the attention and had somehow made it this far without even dating anyone. It only made Coach McGill want him even more and tonight she planned to claim him.

"You look a little sore after practice today. Turn around, lemme give you a little massage to help you relax." Coach McGill cooed to him reassuringly as she placed either hand on his shoulders and began to knead at the points of tension. Obediently Stevie followed her instructions and turned so that his back was to her. A wicked smile spread over McGill's lips as she purposely leaned forward to push her breasts against his back but not quite so much that he would feel anything else prodding against him.

"Uh, Ms. McGill?" Stevie started to stammer a little as the warmth of her bare boobs were pushed against him.

"Just call me Coach." Mcgill purred as her massaging fingers began to work from his shoulders and instead along the sides of his torso and along the front of his toned tummy.

"C-coach... I don't think we should be..."

"What's the matter?" she whispered into his ear as one hand started to slip sensually lower toward the tight spandex of his speedo while her other gave a purposeful pinch of one of his nipples. "Do I make you nervous?"

"A-AH~" Stevie gasped as her fingers pinched and playfully twisted at the soft nub on his chest. A weak spot had been found! She made a mental note as she continued to idly toy with is sensitive nipple. "C-coach please I'm getting..."

"Hmmm? Oh no, Stevie! You poor boy!" Coach McGill giggled as her wandering hand slipped over his swim team bottoms and found his erect dick straining against the tight material. "You should have said something sooner you poor thing. Here, lets just... slip these off shall we?"

"C-coach..."