The cool pool should calm you down, right?

Wrong.

Well, it seemed like a good idea. Conscious of the fact that your unruly penis was not going to play nice, but was getting hard once more, you get up from the lounger and run like the wind, jump into the pool, create a proper splash that causes several people to give you dirty looks. Yet that damnable erection isn't going away.

So much for that idea.

Instead, you decide to swim laps for a while. That does the trick. You can feel yourself getting soft and calm.

Until Shelly gets up and gracefully saunters to the edge of the pool, waves at you and sits at the edge. Those curves are killing you! Especially since you're certain that her breasts have grown from yesterday, meaning that your True Self doll shaping is still working. And you're not the only one noticing her - the eyes of nearly everyone at the pool area are glued on Shelly and your wicked sister seems to bask in the attention.

Well, it's not going to get any easier, so you might as well get used it. Few strokes bring you to the edge of the pool and before you can even say anything, Shelly slides into your arms, giving you a tight hug.

"Did you miss me, little brother?" She whispers to your ear.

"Uh, I was here for like five minute before you came", you respond in confusion. Shelly frowns and her hand grabs your erection through your shorts under the water.

"Nuh-uh, someone is clearly missing me", she continues. You swallow and nod.

"Now don't even think of dunking me or anything", Shelly warns you. "I don't want to mess up my makeup", she continues as she carefully waddles towards the wet bar.

Scanning her hotel-supplied electronic bracelet, Shelly pays for two fruity cocktails. The afternoon passes in comfort, drinking and tanning and swimming when you're not talking with Shelly. You're having the time of your life and you can feel how the two of you are getting even closer. Well, you are getting closer to her, as thanks to your modifications, Shelly already worships the ground you walk on. At some point, you realize you weren't even objectifying your sister at every opportunity! You're not constantly hard, and you're actually feeling pretty zen.

All that shatters when Shelly announces that the "old farts" will be awake soon and planning for dinner, after which she leans toward you and whispers: "so we need to get back quickly if you want to jerk off on my tits again, little brother."

Yeah. You're hard again but the giggling minx that is your sexy sister apparently cares not.

The moment your hotel room door closes, you push Shelly against a wall, grab her with both hands and smash your lips against her face. For a moment, she tenses up, before melting in your embrace. After an eternity of lip-lock, you pull back, out of breath.

"Oh brother", Shelly moans, her eyes moist. "Kiss me again", she commands and you're more than willing to comply. This time her mouth opens and your tongue need no further invitation to enter and duel with hers. Shelly grabs your hands and moves them on her butt, which you interpret as an order to maul her cheeks to your heart's content, while her hands return to your hair. She even lifts one leg and wraps it around your hip. Your dick is as hard as a diamond as you rub it against her pelvis as best as you can through your shorts and her bikini bottom. It doesn't take long for Shelly to drop her hands down and unleashing it.

You've leaked just enough pre-cum so that your sister can get straight to jerking you off with steady movements, her dainty fingers wrapping around your dick. Ít feels even better than before your trip to the pool. Must be the kissing, you rationalize, before the pleasure drives all logical thoughts from your mind, and you concentrate solely on the sensations. Despite your two earlier ejaculations, Shelly's skilled grip rapidly brings you to the edge. You grunt into her mouth as your cock spits over her hands and thighs.

"There you go little brother", Shelly says, clearly out of breath herself. The two of you just stand there, an inch apart, staring at each other's eyes. You're tempted to push things further, yet you can't decide whether Shelly expects you to take charge or she's not ready to take the next step, yet.

The tension is broken by both of your phones going off. Shelly quickly picks hers up and answers it, so you do the same with yours.

"Hey son, get dressed and ready to go. We're going out for dinner", your father tells you in that very familiar no-nonsense voice. "Got it", you answer in the same tone. There's no need for further words, so he hangs up. Shelly is still talking on her phone, so you take the opportunity to clean up in the bathroom.

"That was Glynda, we're going out for dinner", Shelly explains to you as you step out, all fresh and clean. "Yup, dad told me the same thing", you tell her. Now that the passionate moment is over, a strange sense of awkwardness seems to have enveloped you. Even Shelly, so unflappable as she has been for the last two days, seems affected.

So you get dressed, grab your phone and go down to the hotel lobby to wait. It can be fun to just spectate the people coming and going. There's an exhausted family, their kids crying as the harried parents drag them towards the elevators. Near them, a trio of old guys with beer bellies and flip-flops laugh as they walk outside. A pretty local girl hands them fliers until the doorman shoos her away. Group of well-dressed Westerners, clearly tipsy tourists, arrive all smiles and laughter. Then you spot her - a stunning exotic beauty sitting in a corner. Your eyes zero in on her, drinking in her delicate features when a voice startles you:

"I know what you're doing"