{Author's note}
There will be a lot smut in this chapter. It should be obvious by my previous Author's note and the title of the chapter. If you don't like it, leave. Thanks and enjoy the lemons.

{Chara POV}
I never thought I'd ever want to ask someone to have sex before. Especially not a goat monster. But it happened. I did my research beforehand regarding positions. I even found out that the you couldn't hear any noise from outside our room. The day went by slowly for me. Once it was time for bed, I went to Asriel and asked him a question.

"Can you stay up tonight?"
"Sure. What's going on?"
"Just trust me."
"Alright."

I waited for Toriel and Asgore to fall asleep, and went to Asriel.

"Do you know what sex is, Azzy?"
"Huh..? Well... Yeah. Its what monsters do to reproduce or to just feel good. Mom already gave the 'the talk'. The rest I figured out with the phones mom and dad gave us."
"Humans do that too, and I want to try it with you."

He blushed like crazy.

"W-Well if you want to..." He said softly.

I begin to lift up my sweater until my chest showed. He was staring at my chest.

"So your a bigger perv than me, huh Asriel?"
"I-I was j-just..."
"Its fine...~"

I removed my sweater entirely and began sliding my shorts down. Asriel was a nervous wreak.

"W-What if I-I screw t-this up..?" He said.
"How could you possibility screw sex up?" I reassured him.
"I-I don't k-know, but it still m-might happen..."
"Relax, Azzy. You just have to do as I say, alright?"
"O-Ok..."

I remove the shorts and let's him look at my panties.

"Lick it, Asriel" I said in a soft voice.

He got down and began to lick my crotch. I could tell that he was enjoying it. It felt good. His tongue was rubbing my already wet panties.

"Heh... This can't be your first time doing something like this..." I said.
"It is... But does that mean I'm doing well?" He responded.
"Of course you are."
He removed the panties himself and got a nice view of my entrance. I could see him blushing even more somehow. I brought him up to my level and kissed him. I put my hands on his shorts and slid them down. I did the same with his underwear. He was surprisingly big. I grabbed his cock and began to jerk him off.

"Ah..." He moaned softly.

{Asriel POV}
It feels so nice. I never thought THIS would happen between us, but I'm glad it did. Suddenly I feel myself getting pinned to Chara's bed.

"I hope you're alright with this, Azzy~." She said.

She climbed onto me. I was really nervous, but fine with this. I nodded and let her do what she wanted with me. She started to go down on my member. It felt so good. Small moans escaped both of us. She smiled and looked down at me.

"Wow... Your dick is really big...~"

It was really weird to hear that from her.  I didn't think she would be into this. To be fair, I didn't think I would be into this. But here I am. At any point I could ask her to stop and she would. She pulled it out and put it back in. She continued to do that. All I could do was moan.

"A-Ah...~ Chara...~"

She started going faster and we both couldn't stop moaning. Then I felt it. I was going to cum. If humans and monsters are as similar as Chara says, then she'll have a baby if I came in her. We don't want anyone to find her with a baby. We don't even want anyone to know we did this. I way laying down so I had no choice.

"C-Chara... I'm g-gonna..."
"H-Huh..?"

I could see her expression change. She quickly got off me. I couldn't hold it in and I came all over her face and chest.

"A-Aaaah~!" I moaned as I came.

Chara got some of it on her finger and licked it off. Then she grabbed my penis again and began to rub it. Then she stopped, got down, and started sucking on it.

"C-Chara..~"

It was too much for me to handle. I came again in her mouth. She swallowed as much as she could and coughed. We laid on my bed together for a few minutes. I was completely clean but Chara had a lot of cum on her.

"Do you have anything I could use to clean up?" She asked.
"I have a s-spare towel." I responded.
"That'll work. Thanks Azzy."
"No problem, Chara."

Once she was clean, we both put clothes on and got in our beds. I still can't believe that we've has sex today. A part of me wants to do it again, but I'm tired. I need sleep.

"That was fun, right Azzy?"
"Yeah... It felt amazing."
"Wanna do it again sometime?"

I nodded and slowly drifted off to sleep. It all worked out in the end.

{Author note}
I doubt anyone actually cares about this fan fiction but for those of you that do, I'm sooooooo sorry for being late on posting this chapter. Suggestions keep this really bad fan fiction going, so if you actually care, don't be shy. I'll most likely start working on a different story, but I'll continue working on this one. Thanks to everyone who actually read this stupid story. 👏👏👏