Undertale - One Shots and Lemons

Sans x Reader *Lemon* (Thanks Undyne)

Today was a special day. You and your friends had a girls-night at Toriel's place, since it was your place as well. Alphys and Undyne came with some food which the warrior made herself, but to your luck Toriel made some cake, that tasted so sweet you couldn't have enough of it. The goat-like monster was like a mother and sister to you. Since your first day underground she loved you and you could only do the same.

Frisk was sleeping in your shared room, since he was too young to hang out with the guys today and since he was a boy he couldn't sit there with you girls.

While Alphys told you something about an anime, Undyne came from the kitchen with a bottle of red wine and three glasses. Giving her a curios look you watched what she made. Filling the tree glasses she gave one to you, then one to Toriel and at the end one to Alphys with a sweet smile. Suddenly Undyne hold the bottle up into the air.

"Let us drink on wonderful night without annoying guys!" Everyone eyed her with unreadable expressions. That when the warrior got upset: "Clink the fucking glasses!"

Laughing you did as she said. Toriel kind of didn't like the way Undyne drunk from the bottle but she didn't said anything.

As the evening went on, more than two bottles of wine were drunk and you and Alphys were sitting on the woody ground, while Toriel sat on her chair and Undyne has turned around a chair that belonged to the dinning-part of the salon. She still held a wine bottle in her hands and a pink plush covered her cheeks.

"So tell me, (y/n), how does it feel to kiss a skeleton?" asked Undyne with a bright grin on her lips. Toriel gave her a aggressive stare, but the woman laughed it off. "C'mon. We are all old enough. So tell us, (y/n)."

A short laugh escaped your lips. You and Sans were together for quite a long time and everyone knew about it. There was nothing to hide. "Don't ask. The first kiss was really awkward. But now, it's pretty cool feeling. He might have no lips but his tongue..." You drifted away in thoughts.

"T-tell us about... t-the f-first kiss..." demanded Alphys to your surprise.

Nodding you grinned. "We bumped our heads like three times while trying to figure out how it works between humans and skeletons." You laughed at the memory. "He was so desperate afterwards it took me the whole day to cheer him up."

"So he hurt you?" Toriel asked a bit upset.

"No, no! Of course not. He makes me happy."

Undyne stood up with her arms crossed before her chest. "Ha, I'm sure I'm way better with my tongue than him, right Alphys?" Saying so she came over to the said monster, sat down beside her and put an arm around the blushing Alphys who didn't know what to do.

Suddenly your face went red. "Can I ask you guys something?" And you swear to god, if you wouldn't drank the wine you wouldn't ask that question. Everybody faced you. Undyne nodded, knowing she will be the one to answer.

"I'm a silly human and I know barely anything about monsters... so... are there female skeletons? And... w-what's the difference between male and female... you k-know..." Your face went even redder.

Firstly Undyne was thinking; then she grinned goofily. Alphys turned as red as you were and Toriel... well she was upset and ashamed at the same time.

"So you two did never...?" Undyne grinned even wider. "Let me tell you this: How can a skeleton eat or have a tongue? Magic." Dynamic the big fish jumped up, gripped your arm and pulled you up as well. "And you're going to see it yourself tonight."

"W-What? N-No!"

Your protest was in vain. Before anyone could do something you and Undyne were heading towards Snowdin where Papyrus, Sans, Mettaton and the King had their boys-night. They wouldn't like two girls to interrupt them. On the other side... It was Undyne the Undying. No one will protest...