“So, let me see if I’ve got this right.” Discord hummed, ignoring Luna’s glowing horn. “You’re saying you want a little fun, without any attachments, proposals or responsibilities getting in the way?”
 
“What I want is none of your concern.” Luna spat. “I’d think, since you are courting my sister that you would be far more attentive to her needs.”
 
Discord growled and his features darkened. “As of earlier today, Celestia and I are no longer ‘courting’. Apparently she felt she had to chose between her duty and me. Hint; she didn’t chose me.”
 
“How do I know you are not spinning a fable to entice me into lowering my~~”
 
“Go ask your sister if you must!” he hissed, losing his temper slightly as the alcohol in his belly weakend his self control. “My offer is this; One night. Just tonight. We both let our guards down and have some much needed… release. As soon as the sun comes up we part ways. No one has to know, unless you personally feel like bragging, which I would totally understand. But, I will agree to keep my lips sealed. We both get our ‘needs’ met, drink some wine, let loose and no one has to commit to anything more than a single night of fun.” his eyes glowed yellow and he held out his lion paw to the Princess of the Night. “Do we have a deal?”
 
Luna stared at his paw, then flicked her eyes to his face. “You swear you would not speak a word of this?”
 
“Unless, for whatever reason, you give me direct permission to do so, I swear on my life I will not speak a word of what goes on tonight.”
 
“If you are lying about your status with my sister~~”
 
“Blast me. Send me to Taurtarus. Turn me to stone. Whatever you want, I don’t care. Do we have a deal?”
 
Luna glared at him a few moments longer. The light from her horn faded and she shook his paw with her hoof. Discord grinned and was about to speak, when Luna twisted her hoof and pulled him close.
 
“I’ll agree to your terms, but tonight, I’m in charge.” she breathed in his ear. His cheeks blushed and he pulled his head back to look at the alicorn’s glowing, mischievous eyes.
 
“Your wish is my command, Princess.” He snapped his fingers and they vanished, leaving no trace on the cold and empty Canterlot street.  

 
Aaaaaaaaaaand then Prince Noctus happened. lol  
Just an excerpt of the night Luna and Discord did the do. I wanted to expressly state that while both of them get intoxicated during the night it was consensual on both sides. Discord didn’t take advantage of her and she did not do this just to apease him. They both had something to gain.
 
MLP: FIM (C) Hasbro  
Art (C) PamPoke