Just A Walk Home From Work - Undyne x Dom!Fem!Reader NSFW

Wrestle and Chill

Hey! Sorry this took so long! Also sorry if there's any grammar/spelling/other mistakes cause I didn't look over this that well lol. Anyways, hope you like it okay! It's not the best but I tried ><
~Author-chan x

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Being the only other female in Asgore's royal guard, Undyne took a liking to you immediately. She made it very clear which way she swung very early on in your relationship, and you in turn, did the same. From there, your mutual flirting with each other escalated all the time. She would often compliment you on your work performance, and sometimes even smack your butt when doing so. Soon, her compliments began to be on your appearance too.
She began to lean against the wall where your post was, and you two would talk for hours about your interests, personal lives, etc. You quite enjoyed your company, and Undyne clearly enjoyed yours too.
So, it was no surprise when one day your captain suggested that you continue your conversation after work. You agreed, and the two of you ended up walking back to your house together when your shift was over. This was the first time you had seen Undyne outside of her armor, and you found it hard to keep your eyes off her toned but shapely figure and shining blue fish scales. She seemed to be eyeing you as well, and you felt your face heat up slightly when you saw her lick her lips. You seemed to both know where this was going, and you felt your heartbeat quickening in your chest all the time.

When you arrived at your home, you were about to pull out your keys to unlock the front door when Undyne put a cold hand on your shoulder.
"Now stop right there, (L/N). I, have a challenge for you," she announced.
You turned turned your head toward her and raised an eyebrow. "Oh really?"
"Yep, I want you to find an alternate way in," she told you.
You stepped back, looking up at your house with your chin between your thumb and index finger. "Hmmm..."
Then, you walked over and put your foot up on the windowsill of the front window. You stepped up onto it, then, with minimal effort, you proceeded to pull yourself up to your second story window. Below you, Undyne watched with her arms crossed and a smirk on her face. You pulled open the window and climbed into your room, before turning around and giving Undyne a thumbs up.
"Hey, nice one!" She praised, clapping for you before nimbly leaping up after you.
She ninja-rolled in the window and sat criss-cross in the floor beside you, beaming the way she always did after she did something impressive. Then, she looked around for a second.
"This your room, huh?"
"Yup," you replied.
"Cool." She sounded excited.
She stood up and turned around, flopping face-first on your bed with her arms out. You laughed and stood too, lightly kicking her on the leg.
"Dork."
"Hey, who you callin dork?" She said, rolling over.
You grinned and leaned over, putting your arms on either side of her. "...Dork," you repeated, licking your bottom lip.
Undyne laughed loudly, pulling you the rest of the way on the bed. "Oh, it's ON now."
This began an intense wrestling match on your bed, filled with lots of laughing and grunting. You got the idea of jamming your fingers in Undyne's armpits and tickling her, and that was how you won the fight. When she was weak from the tickling, you pinned her on her stomach with her hands behind her back.
"You're under arrest," you declared proudly.
"Oh yeah? And what're ya gonna do with me?" she asked, smirking up at you.
You grinned. "Hmmm..."
Then, you turned her back around to that she was facing you, and straddled her. Undyne kept her hands behind her back, face dusted with red.
"Well, maybe something like..." You leaned down and kissed her, and she kissed back hungrily.
Her lips were cool and wet, and slightly salty. Her tongue quickly met yours, and they danced between your mouths while Undyne's hands snaked up your thighs and to your hips.
Meanwhile, your hands found the hem of her shirt, and swiftly pulled it up over her head, breaking the kiss in the process. Your eyes glimmered as you looked down at her black sports bra, and your hands gripped her breasts through it. Undyne closed her eye, and sighed quietly through her nose. You slid your hands under her bra and pulled it up over her head as well. Your hands massaged her chest, while hers caressed your sides. They slipped under your shirt, and sent goosebumps raising over you from their cool temperature.
"This is nice," you sighed.
"Uh huh," Undyne replied, smiling faintly.
Then she pulled your shirt up over your head, and unhooked your bra right after. She sat up and licked around your left nipple, before wrapping her lips around it. You gasped and tilted your head back, moaning shakily and sliding your hands onto her shoulders. She caressed your back and licked your neck, and your hands moved to her lower back so that you could roll your hips up against hers. Undyne hummed, and wordlessly adjusted so that one of her legs was on top of hers. That way you had better access to her nethers, and you accordingly ground yourself against her. She gasped and pulled you into another kiss as you rubbed up against each other, gasping and moaning into each other's mouths.
Soon, you had all your clothes off, and were scissoring each other softly.
"Wait," you breathed, getting off of her.
Undone sat up, looking over at you and catching her breath as you pulled something out of your side table drawer. It was a strap-on, that was bright pink with orange on the very tip. You held it up, looking over at her. Her eye brightened, and she leaned back, spreading her legs.
"Oooohh yeah~"
You chuckled, hurriedly putting it on and crawling back on the bed.
"You ready for this?" You asked, putting an arm on either side of her and lining yourself up.
"I was born ready," she replied.
Without another word, you shoved yourself in, and Undyne gasped hoarsely.
"Fuck," she breathed on her exhale, handing moving up to hold onto your shoulders.
"You okay?" You asked, smirking.
She nodded.
So, you began softly thrusting, and she moaned in response. Her hands traveled over your chest and caressed your back, and even held onto your hips to push you deeper.
"Good...good..." she muttered mindlessly, eye closed.
"Faster...?" you asked.
Undyne nodded.
You picked up your speed, and Undyne's back arched and her moans got more high pitched. It took a little while of adjusting your speed and intensity, but eventually Undyne was screaming your name.
"(Y/N)! Fuck, I'm close!" she exclaimed, eye squeezed shut as sweat dripped from her pores.
"Cum for me baby~" you purred, giving her all you had.
And suddenly, she did, squealing like you didn't know she was even capable of, and clenching tightly around the fake member. She spilled her liquids onto your bed, but you didn't mind.
Undyne breathed heavily as she came down from her high, slowly opening her eye. "Oh...fuck...you're good with that thing..."
You sighed, slowly pulling out of her, your legs shivering with arousal all the while. "Thank you..."
"What do you say I return the favor?" She asked, smirking up at you
You smiled, removing the strapon giddily. "Oh, yes please~"
"Get up here," she pulled you up once you had tossed the toy in the floor, and positioned you so your thighs were on either side of her head and your womanhood was hovering over her face.
She traced her tongue in a ring around the outside, then dove right in, clearly not caring much for teasing.
"Oh!~" you moaned, feeling her spined tongue rub roughly against your entrance.
You arched your back into it, closing your eyes and playing with your breasts as she lapped hungrily at your folds. Undyne hooked her arms around your thighs and dug in, although delicately to avoid hurting you with her sharp piranha teeth. You loved every second of it, shivering and moaning from the pleasure and even tugging on your own hair at times.
"So good!~ Undyne!~"
She purred and kept going.
Finally you felt your orgasm coming in your gut, and sucked in a breath. You reached down and rubbed your clit hard as Undyne continued, and then came all over her with an exalted yell.
When you were done you shakily climbed off of Undyne, and collapsed on the bed next to her.
"How was that?" she asked, catching her breath a little too.
"So good," you replied, smiling and throwing an arm around her.
"We need to do this more often, huh?"
"Definitely."