Nightmare x Reader (You will be mine)

Iris looked pleased with that Nightmare was going to help her in her quest to save her dear friend from his fate.  Nightmare said, "Killer show our friend to the room she'll be sleeping in."  Killer said, "Yes master Nightmare."  Killer and Iris walked to the room she was staying in.  Killer said, "Yell if you need anything."  Iris said, "Killer I want to know something."  Killer said, "What is it I know you're new here and all but we're very busy you know?"  Iris said, "Why did Nightmare take the shrine maiden and bring her here?"  Killer said, "I don't know it could be because he loves her or something like that."  Iris said, "He does I didn't think a guy like him could love anyone let alone be in love with her."  Killer said, "Beats me why he brought her here I mean he did defile her with his tentacle after all but don't think she'll get pregnant from that at least I don't think so."  Iris said, "Does Nightmare plan on freeing Chaos Sans and what does he want him for?"  Killer said, "I can tell you this much he does and as for what he wants with him I don't know.

Time skip brought to you by Sans dirty sock

Nightmare walks to Y/N room and opens the door to find her sleeping in her bed.  Nightmare chuckles at the site and thinks to himself "I can't wait to make you mine and mine alone we're going to have beautiful kids together I can't wait for us to be married."  Nightmare's train of thought was interrupted by Y/N yawning.  Y/N woke up to see Nightmare staring at her.  Y/N asked, "Why are you staring at me for you know I don't like you asshole?"  Nightmare said, "I know you don't like me but that doesn't mean I won't keep trying to make you love me."  Y/N said, "So Nightmare why did you bring me here in the first place?"  Nightmare said, "I needed to take you away from there cause the townspeople were going to kill you after they found out that you were defiled in the shrine."  Y/N said, "Let me guess I'm pregnant now because of you raping me with your tentacle."  Nightmare said, "No you're not it doesn't work that way I only filled you with my negative magic and  in a way you could say I could get you pregnant with my tentacles but not now."  Y/N said, "Oh really that's so hard for me to believe you what do you want from me then."  Nightmare said, "Well you don't have to believe me and as of what I want from you should already know what it is that I want."  Y/N said, "Like hell, I'll ever marry you first of all you kidnapped me from my home second of all why would I ever marry a fucking skeleton bastard I heard about you from books your not such a great guy all you want is to take over the world and us me as some way to achieve that or is it because you don't want Dream to have me is that it."  Nightmare got enraged and smacked you across the face.  Nightmare said, "Don't you ever talk like that to me ever again bitch no your place you're my slave and you'll do as I say no matter what it is got it."  Y/N looked shocked as she has never been hit before and before she could say anything Nightmare left the room.

Time skip brought to you by Temmie flacks a part of this complete breakfast 

Nightmare was sitting in his throne room thinking about what Y/N said to him.  Just then Killer walked in and said, "Hello my lord what is our objective for today."  Nightmare said, "Well Killer I was thinking about how am I going to get Y/N to love me if she hates me what should I do I'm not good with relationships."  Killer said, "Don't know maybe give her gifts as a way to show her you care or as a way to bribe her into marrying you or you could get her pregnant and then she'd have to marry you."  Nightmare said, "Hmm I guess you make a good point but what would I give her I don't know what to get girls I've never been with one they're so annoying I mean my mom was a tree spirit and she liked anything we gave her."  Killer said, "Why not ask Iris what girls like she's a girl, after all, I also found some stuff out?"  Nightmare said, "OK I'll ask her but first what did you find out."  Killer said, "Well Iris told me that Y/N isn't the only one who is the key to breaking that spell we need to kill the goddess of Ice Wisteria is she the one who also holds up the spell that was put on Chaos Sans?"  Nightmare said, "So the goddess of Ice is the one we need to kill then?"  Dust just came in and said, "It won't be easy I heard from Iris she is the strongest and most mysterious one out of all the goddesses and they can't be killed by normal means either gods or goddesses can kill them or skelagod like Reaper Sans could kill her."  Nightmare said, "Hmm I know the skelagod won't help us out most of the other Sanses hate me so I guess I need to pay an old visit to Error then."  The others were surprised by the mention of Error.  Nightmare said, "Horror bring Error here at once it's time we had a little chat."  Horror said, "Yes sir."

Time skip brought to you by hurts donut 

Error was minding his own business and distressing after having to put up with Ink talking about another stupid AU again.  Horror walked up to Error and Error stop what he was doing and was going to yell at who he thought was Ink and turned around to see it wasn't Ink but Horror.  Horror said, "Hello Error Nightmare would like to have a chat with you."  Error said, "Really about what."  Horror said, "Just come with me and find out for yourself."  With a sigh Error fellowed Horror to Nightmare's castle.

Time skip brought to you by Iris

Nightmare said, "Ah Error it's nice to see you."  Error said, "What the fuck do you want?"  Nightmare said, "Well Error I need you to help me with a plan I have to take my little brother down once and for all?"  Error said, "I'm listening."  Nightmare said,  "But I need you to help me get rid of a certain goddess so I can free Chaos Sans from his prison."  Error said, "A goddess huh well how can I help you out with that."  Nightmare said, "Use your powers to manipulate Reaper Sans into fighting her or his sons I don't care who you use as long as this goddess is dead."  Error said, "Well I guess I can I've never heard of this Chaos Sans before I wonder why Inky has never told me about him?"  Nightmare said, "Good we'll go first thing tomorrow."  With that Error left to start planning on how he'd get Reaper or one of his sons to agree to this.