The Lost Prince (Nightmare Sans x reader)

10💜

Nightmare's Pov:

I woke up, (Y\N) she was holding me close to her chest, I knew I was in my normal form but I didn't care.
"(Y\N) we have to get up" I said caressing her cheek, she smiled and opened her eyes:
"hello sleepyhead, the king probably wants to see you" I said, "maybe you're right" she smiled and kissed my forehead; I got up and transformed myself again.

(Y\N)'s Pov:

Nightmare and I left the room and a guard immediately came to talk to us: "prince, princess, the king wants to talk to you", "sure" I said, took Nightmare by the hand and we went to the throne room together. Dream was there too, he seemed very annoyed: "hey Dream" I said greeting him, "(Y\N) now do you know the truth?" he asked, looking like he hadn't slept much that night,
"yes yes, but it's ok now don't worry",
"he killed your parents (Y\N)",
"Dream shut up, don't make a scene here" Nightmare stopped his brother and the king entered.

"Hello, (Y\N) yesterday I spoke with Nightmare and I was impressed by his plans" Nightmare smiled,
"the document you brought me is official, your parents had already planned your wedding, do you want to do it?",
"yes grandpa, if I have to marry someone then I want to be with Nightmare" he turned to look at me smiling and approached me,
"do you know that you must have at least one child?" I blushed,
"it'll be fine" replied Nightmare"; "well, then I don't see any reason why you shouldn't get married" Dream stamped his feet and walked out of the room angry.
"(Y\N) you will be 18 in a few days, do you already have an idea of ​​what to organize?" the king asked me,
"actually yes, I was thinking of organizing a ball, would that be okay?",
"yes of course, I'll take care of inviting everyone, now Nightmare you can go while I talk to the princess" Nightmare smiled at me and went out of the room.

I followed my grandfather and we went to talk in his study:
"What do you want to talk about grandfather?",
"about him, I've never met anyone so intelligent",
"Night? Yes, he's really fantastic" the king smiled at me and said sit.
"you shouldn't have been with Dream, your parents also wanted to see you with Nightmare" he said looking an old family photo,
"he will be a very good king, he knows how to run a kingdom and he also has a good team of knights", "I see you have met them too" I said,
"yes, I also authorized Nightmare to call also two other members who I think will arrive soon"

MEANWHILE...

Nightmare's POV:
"A little angry?" I said entering Dream's room, a big mirror was thrown on the wall near me, in the corner of the room there was Dream: four big black tentacles came out of his back, he was almost totally covered by my own substance, only a part of the face and chest were still normal.
"I should have killed you many years ago" he told me, his voice much lower than normal,
"but you didn't and now here's the result"; Dream made to hit me with a tentacle but I blocked him.
"I've had this shape for years Dream, you know well that I know how to use it better than you" he growled as I approached smiling,
"come on little brother, look how beautiful we are, we are just like two real twins" I took a piece of the mirror, "it's not nice?",
"I'm not like you, I'd be a better husband" I huffed pushing him away,
"still with this story? you really fucked up",
"fuck you nightmare",
"nah I'd rather fuck (Y\N), maybe I could even tell you how she is",
"try to touch her and the tentacles behind your back won't be the only ones to be cut off",
"keep calm little brother, in a few months you could also become an uncle" Dream was really fuming with anger; I laughed and left him alone walking out of the room