Sylveon walks down the stairs to the cavern floor, her tail swishing side to side, as she could hear what sounds like some loud sounds of water dropping from the cieling above.

"A waterfall!"

Her tail wags more happily while picking up the pace to the bottom of the stairs. Upon reaching the bottom, her paws set firmly into the grass and looks around at her surroundings to see the crystal clear lake in front of her and over to her right side abit is a huge waterfall pouring from a hole in the cavern walls.

"Yes yes, this is perfect"

The waterfall big enough to hide behind and also loud enough too, plus there's a few rocks she could hop on to get behind the waterfall.

This would be a perfect home for Umbreon and her.

Smirking over at the waterfall, Sylveon whirls around to see Umbreon approaching her from the stairs and goes over to him giving him a hug.

"There's a waterfall here Umbre" she whispers in his ear.

He blush abit from the sudden hug and look over to his right to see the huge loud waterfall falling into the crystal clear lake plus a few flat rocks in the water that can be hop on leading behind the waterfall.

"Y-Yes I-I see Sylvia umm but c-can we explore this cavern just for abit?"

She slyfully smirks getting the hint of what Umbreon saying in her point of view. So by wrapping her ribbon feelers around his body to keep him very close to her, the two Eeveelutions walk the other way of the cavern to explore it.

Walking on the grass felt between her paw toes was abit ticklish since she's surprise grass would be growing inside a cave, maybe it's the ecosystem on the island.

But it didn't matter to her at the moment, cause right now she wants to get Umbreon behind the waterfall and lay down there next to him.

"And me laying on top of him, oooo this is so perfect"

Her face smiles happily since the cavern is the perfect home for the two of them on the island.

Moving his eyes over to her, Umbreon could see Sylveon tail wagging side to side including that big soft squishy and fuzzy butt of hers too. It certainly jiggle every step Sylveon took and part of him just couldn't help but reach behind giving it a soft squeeze.

And that's what he did.

Hearing a gasp from Sylveon he saw her look at him with a slyful smirk and a look in her eyes telling in her point of view that Umbreon would like her now.

"Someone seems to be in the mood now"

"W-well um I-I'm j-just curious on it feels" he admitted blushing red.

Taking his paw off Sylveon rear end, he starts to back up abit unaware of how close he is to the edge of the crystal lake.

Noticing him getting closer to the lake, she slyfully smirks and playfully glare at him walking over to him. A growl escape her lips but she wasn't making it sound serious.

Sylveon wanted to have some more time with Umbreon, that squeeze to her rear end definitely got her in the mood and she gave into that feeling.

"Someone needs to be taught a lesson here and now"

He back up some more worried he might've made Sylveon uncomfortable now from the squeeze.

"I-I'm sorry Sylvia, I-I.."

"Time for punishment"

She leaps at Umbreon tackling him into the water making a splash in the process. The time for fun is  now.

A few moments went by and Umbreon head pops out of the the water but ribbon feelers wrap around him from underwater.

"S-Sylvia w-wait"

He's once again pull underwater as bubbles were forming in the water the two Eeveelutions were in.

As her head pops out for a moment to catch some air, she dives back in to look for Umbreon only to see him swimming away from her. She grins and swims after her prey, nothing will escape her sight.

He near the surface trying his best to swim, but in truth, he really wasn't a very good swimmer and he's never told Sylveon that, not that she needs to know but he didn't swim much when he was an Eevee.

"Arceus, come on paws don't fail me now"

Just as he nears the surface, the ribbon feelers once again wrap around him but his hind legs this time and struggle to get free but Sylveon pull him over to him and wraps her paws around him giving him a kiss on the lips.

He could feel her lips press on his and try to get free since air very important.

Of course Sylveon swims the both of them to the surface and their heads pop out of them water.

Both Dark and Fairy Eeveelutions began to catch their breath but Sylveon wasn't finish yet Umbreon.

The fun just beginning.

She press her lips on his and starts to kiss him deeply as her paws wrap around his neck.

"W-wait, I-I mmmmmph need too catch mmm my breath mmmm"

Her kisses were definitely sweet and part of him began to get in the mood as he could feel Sylveon hind legs wrap around him underwater.

"Well mmmm hurry up Umbre, we need to go underwater mmmmm"

She continues kissing him hearing a moan escapes his lips while he tried pulling away but she keeps her body wrapped around him and even has her ribbon feelers around too for extra measure.

"Enjoying your time with Umbre"

She definitely was and it would get even better too once they go explore the waterfall.

"Make sure you pin him in the grass that way he has no escape"

She loved him so much. This cave will be there home, maybe the whole Island if there's no other Pokémon around.

Leaning backwards, Sylveon pulls Umbreon underwater this time for more entertainment and no body space left between the two, she's definitely gonna keep her lover close by that way he doesn't leave her sight, ever.