Sans AU One-Shots

Dream || royal pains. (pt. 2)

Pairing: Prince! Dream Sans x Princess! Female Reader
Prompt: When you're at your loneliest, your husband's brother makes you feel wanted, stirring up emotions you'd never felt before - not even with your husband - and you wonder if you married the wrong brother.
Type: cheating in a loveless marriage, bitter Y/n finding solace with her husband's brother & Nightmare not giving af ('canon' Nightmare lol)
Length: 3k words
Background: This one jumpcuts to after the marriage between you and Nightmare (so technically you're now a queen), with minor tweaks being that Nightmare's plan was never to kill you, only keep you at his side in a loveless marriage (since he never learned to love you). You're there for show instead of actually serving a purpose now that he has what he wants: the crown.
Notes: You should read Part 1 but reading Nightmare's Part 2 isn't necessary to understand this one (tho it would make the background info ^ make a little more sense and give you a little more information about your relationship with Dream before the wedding). 

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I was, in a word, lonely. It was a loveless marriage being with Nightmare, and even as I knew he only married me to get the crown, that didn't ease the ache in my heart for companionship. Each kiss was chaste – of course the only kisses I got were for show so the others would think we were happy together, and that's all I ever felt like: a show pony. He got what he wanted, he was King of his kingdom and able to do whatever he pleased without the restraints of a prince or the other kingdoms looking down on him for his title, and while part of me felt happy for him, a larger part of me just couldn't get over how lonely I felt. We slept in the same bed yet we felt miles apart, and when I couldn't take it anymore and returned to my own chambers – the room I had before our wedding – he didn't even notice my absence, and I wasn't sure how much more of this I could take.

Dream spotted me down the hall and waved, pulling my glossy (e/c) eyes to him, and he paused at the sheer despair on my face. "What bothers you, Queen?"

"It is nothing, your highness, do not worry yourself needlessly over my condition." The words had become so rehearsed they flew from my lips without any conscious input, and he frowned at the familiar words I'd fed him time and time again.

"It is not 'nothing' if it devastates you so." It was like he could feel how bad I was feeling, and I avoided his gaze as he tried to meet mine. "Is it not something you may discuss out in the open?" Nobody was around, at least not that I could tell, but that wasn't why I was silent.

"It is not wise to speak ill of the King." Slow realization dawned on his face, and after glancing up and down the hall, he snatched my hand and headed towards his room. I sputtered with surprise, but he shushed me as he stopped in front of the door, glancing side to side one more time before opening it and pulling me inside. He shut the door, plunging us both into darkness, and he tugged me along with him as he fumbled around for his lamp, finally finding it and struggling to light a match with one of his hands in mine. When he finally lit it, he offered me a soft smile that rivaled Nightmare's cruel one and made stress melt from my shoulders. He had a way of doing that every time I was around him, like he was made of goodwill and positive emotions – everything Nightmare was not.

"What bothers you, my Queen?" His tone was soft, warm, urging me to confide in him in a way I couldn't confide in anyone else. And the words all but tumbled out of my mouth. I told him everything, about how Nightmare saw me as nothing more than a means to an end, that he planned to use me from the beginning then toss me aside once I outlived my usefulness, and that he might as well have killed me for all the good staying locked in this loveless marriage did.

Dream's sockets steadily widened in alarm as I all but collapsed into his side, and he pulled me onto the bed so I could be comfortable as he gently ran his hand up and down my back. I sobbed into his shoulder, clinging to him like a lifeline as the past few months of pain came crashing down on me, and he held me as I aired all of my grievances. He didn't interrupt once, letting me get it all off my chest as he did nothing but whisper sweet nothings in my ear to calm me down when my words couldn't break through the sobs. When I ran out of tears and my words tapered off into silence, he finally tilted my head up with a gentle hand on my cheek.