Altertale Sans x Reader! 18+ *Sin*

Did I just hear-- (chapter 1)

Author, (P.O.V.)

Y/N= Your/Name

P.O.V. = Point. Of. View.

You were laying on your bed, staring at the ceiling. You were thinking, thinking really hard. You thought about your  "dad,"  Sans.
He was always there for you, and he kept saying how the outside of the ruins was a dangerous place, that's one of the reasons why you never left the ruins. The other reason, you felt safer with Sans, you also knew that he wouldn't hurt you. He was funny too! You felt like he was your dad, like he was part of your family!

"Mmm-!"

'What was that?' You thought.

"Mmm-! Y-yeah-♡"

You heard what sounded like a moan, and you heard in the room next to you.
'Did Sans just moan?'
You thought to yourself, blushing deeply.
You thought this, because Sans room was right next to yours, and that's where you heard the noise come from.

"Mmm-♡ S-so good!"

You heard another moan from Sans room again.
'Is he okay?' You thought. 'Does he need help~?' You thought.
You got off of your bed and decided to go Sans room.
You opened the door to your room and closed it silently and slowly, not wanting Sans to hear you.
You stood in-front of Sans room, putting your ear against the door to hear Sans more closely.

"Mm-- kid! That feels so good~!"

Sans moaned, you blushed even more.
You tried to open the door nob, it was open! You turned it slowly and quietly and made no noise!
Then you saw...