Your P.O.V.
"N-no I am n-not, Sans," Alphys said harshly. "A-and you know h-how I feel about th-that language. I swear y-your cursing habit i-is almost as bad a-as Gaster's was."
"Sorry Alphys...it's just you know how big of a deal that is..."
"Well, you l-love each other d-don't you?"
"How did you-?"
"Undyne t-told me what y-you said at her house the o-other day. Plus i-it's written all o-over your faces."
"I don't understand, what is soul-bonding?" I asked.
Sans was silent.
"I-it's the only way I-i can think of S-sans," Alphys said. "It doesn't h-have to happen right a-away but soon. I've never s-seen a soul th-this damaged. If it doesn't ha-happen in the next f-few days...I don't kn-know what w-will happen."
"Alphys..."
"I-i know Sans. Go h-home and explain. I'm s-sure you two w-will work it out."
"Tell me what is going on!" I was sick of being out of the loop.
"Alphys is right Sweetheart, this is something we need to discuss in private."
I searched his eyes for any information but I couldn't find anything but concern and nervousness.
"Alright."
He then grabbed my hand and the world changed once more. But we were...in his room? I'd never been able to get in here...geez it was a mess.
Sans sighed and sat on the bed. "So uh....soul bonding."
"Yeah, what is that?" I asked.
"Well uh...when two monsters are very in love they bond their souls to each other. It bonds their mind and body to their lover's. There's a telepathic link formed as well as a physical one. If one of them gets hurt the other will know right away."
The more he talked the more my face heated up. "So Alphys wants us...to have the monster form of....sex?"
Sans eyes went dark. "......yeahh in a way."
"Wait...is there another form of sex for monsters?"
Blue formed on Sans's face. "Ohhhh kayyy that's a topic for another day, let's just focus on this for now!"
"Right, but I'm guessing this soul-bonding thing can't be broken?"
"Yeah...so if we ever broke up...we'd still be soul bonded," Sans said softly. "Look, Alphys gave us a few days so it doesn't have to happen right now. I know it's a lot to ask but I really do want to make sure your soul is fixed."
"I know..."
"There is one thing I don't get though...you said it was caused by trauma...what exactly happened?"
I stared at the floor for a moment. I hadn't told anyone about this. I didn't want anyone to know. But I also knew...hoped Sans wouldn't use it against me or leave me.
*trigger warning, sexual abuse*
"Wh-when I was little, I had a huge family. We were super close and we knew that we could rely on each other. I think we never saw anyone doing anything to hurt the other...but there was my Uncle. He had been through several divorces and by this point was drinking non-stop. Several nights when everyone was asleep....he would come in my room and...."
".....what did he do?"
I started crying my eyes out. "H-he raped me, Sans."
Then Sans was there with his arms around me, hugging me so tight.
"I promise you...that no matter what...I won't let him anywhere near you again...even if we somehow make it to the surface."
I let myself drown in his scent and feel comforted by his arms around me. He eventually started running his fingers through my hair and I felt myself growing tired.
"Sweetheart?"
"Yeah?"
"This soul bonding thing...if it's too much-"
"No, I want to do it, Sans."
"Are you sure? I don't want to bring up any bad memories or something..."
"I'm sure, Sans."
"Alright...you have a time frame in mind?"
I yawned. "Maybe after a nap and some dinner?"
Sans chuckled. I could feel the vibrations from him in my chest.
"Sounds good to me, Sweetheart."
"I love you, Sans."
"I love you too, Sweetheart."
And that was the last thing I heard before falling asleep in Sans's arms.

YOU ARE READING
Just give up, I did (Sans x deppresed!reader)
FanfictionOne day you just need to escape from harsh reality, maybe the stories of Mt. Ebbot are true? *Trigger warning, this book does get dark*