The Watering Hole

"Oh wow, it's beautiful!" your sister exclaims as she runs past you, emerging into the open area. You silently agree, eyes locked on Robin's 'swimsuit'. It was still white with the blue flower on it, but it had a distinct lingerie feel, being made with neater material and having small holes that exposed parts of Robin's navel and groin. Susan sported a similar piece, although hers was red. You readjust your waistband, still freaked out by the change in your swimsuit. Like the girls, both you and Tyler now wore something that would more certainly be more appropriate in the bedroom than out in the middle of the woods.

Never the less, the area that Robin was describing was indeed quite beautiful. It was a small open space among the trees, the lake's edge crashing alongside a sandy beach. Next to it, further down, there was a large rock that you figured was the one your cousin had spoken about being perfect for cliff diving. In the center of the area, there was darkened fire pit, obviously remnants of past fires Tyler and his sister had created, next to the two tents that were promised.

"It's certainly something" you mumble to no one, following Robin into the watering hole. From between the trees, you even had a perfect view of the setting sun, which was just beginning to crest over the horizon.

"Looks like everything's still here!" You hear Tyler say as he emerges from the tent the two of you will be sharing. You hear Susan acknowledge the same from hers, followed by a quick succession of giggles from the two girls; no doubt the pair having found something quite scandalous within it.

"Shall we jump in the water before the sun sets?" You ask your cousin, motioning towards the silent water. With your previous change now in affect, you're not too sure as to what's proper procedure when it comes to stripping naked to go swimming, and you're hoping to follow his lead.

"Not so fast!" barks Susan as she exits her tent, Robin close behind her. "Robin and I will be going first, thank you. You two are not exposing yourselves while she and I are still on dry land."

Next to you, Tyler lets out a deep chuckle. "Feeling a little horny sis?"

"Hardly." With little hesitation, you watch as Susan bends down and strips free of her swimsuit-lingerie, exposing herself in all her naked glory to the two of you. You only catch a glimpse of it however, noting that Tyler had turned around to give his sister privacy and you quickly follow. You hear Susan finish from behind your back. "I'm feeling fertile. There's a difference."

You hear the shuffling of clothes, no doubt Robin getting naked as well, and that now familiar rush rises within you. It's still slightly alien, yet also strangely familiar - and it seems to beg that you go grope one of the two attractive girls. However, having your back to them makes it more controllable and you simply shuffle in place, exchanging a quick look with Tyler who's doing the same.

You turn around after hearing the second splash, indicating that both girls had jumped into the lake.

Walking up to the water's edge, glancing over the side of the big rock to your cousin and sister, who'd now swam off a little into the distance, you turn back to Tyler, quickly adverting your gaze once you realizing he's now naked. "Um... Will she control herself?" You ask, now unsure.

"Who, Susan?" he replied, patting your back as he leans forward over the rock. You sense him shrug. "Probably. It's your sister I'm concerned about."

"Huh?"

He turns to face you, looking puzzled, worried, yet strangely excited. "Susan used to being in the woods, man. Robin however... I doubt she leaves the city all that much. Don't be too surprised if she hangs closer to you than usual." He warns you with a wink, and you glance back to the two girls, noting that while Susan was talking wildly to your sister, Robin was facing both you and Tyler, staring at you both with a look of deep intent.

"Girls," he chuckles, "Gotta love'em!" And he jumps unceremoniously into the lake.

As your cousin swims to catch up to the other two, you start taking off what are now your new swim trunks, feeling oddly insecure about it. You shake the feeling away, tossing the garment next to where you put the rulebook earlier. You take a quick second to look at it, tempted to use it again before jumping in. However, you tell yourself that there'd be plenty of time for world altering shenanigans later and you follow suit, crashing into the chilly depths.

You felt Robin's eyes on your crotch the entire way down.