Before Sylveon and Umbreon had their first child, the two were building with the help of Umbreon's friends a brand new home for the couple to live in, the project was really ambitious since the house is planned to be pretty huge! Mansion-like huge! It took a lot of time and effort, but they eventually managed to finish this project.
That day, as the help they had finished their part and went back to their home, the two eeveelutions decided to celebrate the end of their hard work by relaxing in their newly functional sauna just between the two... As they went there, Umbreon could smell something though he couldn't really tell what it was, but it was unlike anything he sensed before... he couldn't do earlier because of all the painting in the other rooms...
He didn't ask his lover though, for some reason he smells the odd odor when pretty close to her... he just can't bring up the courage to tell her about it... he feared that she'd mind if he did! Unfortunately, keeping such curiosity might lead to some "instinctive" move later on, but for now they were just going to enjoy a nice time in a hot and steamy room that will relax their tired muscles.
As they started the heat, Sylveon gently pushed the sitting Umbreon to the bench on his back. She of course couldn't resist sitting on his belly as her paws were rubbing his chest, all that to give her love a sweet massage.
Sylveon: Relax, my sweet Umbry, let loose all your muscles... you worked hard... a little too hard even! You did most of the work in the house all by yourself... it's bad for your health you know...?~
Umbreon: S-Sylvy... aaaahhh... you're right but... I didn't want to let all this hard work ruin your pretty face... and damage this perfect body of yours...
Sylveon: Pshhh... can't you not make me blush every time you talk...? It's uh... getting really hot in here, don't add more warmth into it that I'm already giving you~
They soon started to sweat as they embrace, Umbreon's head pressed against her chest... he couldn't control himself, he began licking her neck in a sultry way... he began to pick up the scent again from earlier, better than before... he quickly switched places with his loving Sylveon, being the one on top... he was now free to investigate the source of the weird but sweet odor, he could be heard sniffing her body from top to bottom, giving little licks and kisses in some places...
Sylveon: Mmm... you're... doing it on purpose... bad Umbry... bad~
Umbreon: N-No I... I can't really control... myself... you smell great, I want to know... where it comes from... perhaps lower...?
Sylveon: Teehee! Maybe, give it a sniff why don'tcha? B-But please don't stop those licks and kisses~
The Sylveon just allowed him to explore below her, around her belly, thighs... and eventually crotch where he discovered where this scent came from... even the sweat and hot air couldn't hide it anymore... it smelled nice... arousing even, it... it made him hard between his legs... he began licking it like a dog drinking...! An angelic moan was heard from his lover!
Sylveon: Mmmm, lick it good Umbry... it's for no one else but you...! Fa...nnnhh.... faster
Umbreon obeyed without too much questions, he couldn't... control himself! He was following his animalistic desires... this and his lusty mate's own needs... and as they did that, the room was at it's highest temperature... Sylveon eventually noticed her mate's boner, it was straight, throbbing at her moans... she moved away from Umbreon's mouth just so that she could hug on top of him, wrapping and rubbing herself against his body as they embraced...
Sylveon: A-Alright enough of that... you too seem to want me huh? Nice try hiding that raging boner... but my pussy needs this inside it, and it won't be satisfied until filled with your own seed... Y-Yeah I'm trully in heat right now, you can sense it even if you couldn't understand it...!
Umbreon: W-Wait wouldn't it mean that... that you'll- AHHH! F-fuuuuu...!
His worries was cut short by the sudden thrust of his cock inside her love tunnel by Sylveon herself... she was warm and moist inside... it was unlike his previous times with her... she was riding him as they embraced sitting on the bench... she didn't even take the time to blow him like she usually does! And so they began mating... for real this time... she was at one of her most fertile moment, even one drop of cum would be enough to be pregnant, and she knew that full well!
Sylveon: Ohhhh... U-Umbre...on... fuck me, pound me real hard! Show me your alpha male side...
As he heard that, Umbreon pushed her, turned her around and pinned her head to the ground, he mounted her and continued mating with his Sylveon doggystyle... grunting as he sped up his non stop thrustings while she moaned, both drunk from love and pleasure...!
Umbreon: Sy...lvy... Yeah... you like that don't you? Face down while pounded by your mate? You're MINE, You're MY little fuck toy! I own you!! Got that in your lusty brain?
Sylveon: Yes Umbreon... I'm all yours... I won't... resist you! Just make me the mommy of your eevees!
He smirked as he pushed her hips down on the ground with the rest of her body before making her turn around to face her mate as he'll finish with her hungry pussy! The speed of his humps increased tremendously...! He was about to release all of his seeds inside her pussy that, on that day, welcomed every single one of the spermcells to enter the uterus...
Sylveon: F-F-Fuck...!!! You're gonna...! Mmm yes, do it!!! HHAANNNNHHH!!!
Umbreon: I'm... I'm... CUMMINGAAAHHH!!!
As they screamed from their orgasm, Umbreon managed to push his knot inside her easily! He felt his cock pulsating, throbbing with each shots inside her until there were barely any cum left in reserve! And Sylveon enjoyed every last drip of cum he gave her, problem is now... they were completely stuck, the knot refused to let go of her pussy... oh well they thought... not like they wanted to be seperated right now... they even fell asleep as the sauna was desactivating...
The day after, Umbreon came to see Sylveon in town who just got back from a check up... the results were in... she was pregnant! This brought a lot of joy for the couple... but it took time before she layed the egg and weeks later, it hatched into an healthy male eevee, soon to be known as Flareon... he was the first of many eggs to come from the couple!