Sick and twisted affair - Acnologia x OC (hints of sex)

Just like a sin

Nirasa knew it was wrong, she knew he was a genocidal killer, yet she couldn't help herself to meet him over and over again, sneaking out of her house that seemed way too close to the guild as each night passed on, making her way through lonely alleys, trying to avoid prying eyes that didn't existed, every imaginable gossip running first inside her mind, the woman who slept with the worst enemy of all.

(Smell the fear) There's no reflection when you look in the mirror
You're out for blood and you can smell the fear
You need poison
Like it's the only thing that keeps you alive

Acnologia knew the struggle she had to deal with every night they met, he delighted in her doubt, in the pain filling her eyes as she entered the cave that hid the lust they shared, hidden from unwanted attention, away from the eyes of her beloved ones, away from the shame and away from the feeling of betrayal that pierced her chest every time she went back home and realized what she had done.

No feeling mattered while she was in there, imprisoned amongst his arms like an animal who stepped on a trap, while the weight of his body pressed her against the walls, against the floor. No thought had importance as her mind went blank and empty with pleasure, her orgasm muted guilt and shame.

You hear voices
They just keep telling you, you need me tonight

She wasn't able to be in a silent room anymore, even when apart, Nirasa could hear his husky voice whispering in her ear, purring poisoned words, false affection, a smile forming on Acnologia's lips as he told her one cruel promised soaked in lust when she prepared to leave him each night. "See ya tomorrow, kitten".

She hides until twilight
Then she takes control
I'm like your dirty little drug
And you never get enough
Just a little bad habit that you hide from your friends

Natsu was aware that something was wrong with his best friend, both of them were adopted as orphans raised by dragons, both of them grew up together fighting and laughing, both of them felt attracted to each other yet never confessed... but then what was this feeling of solitude? Even while accompanied by her, even her soft kisses and her prolonged hugs, why did her warm touch now felt cold? Far away?

It broke his heart to see her jump at any sudden call, to find bruises that didn't seemed to belong to the heat of the battle, to see her beloved brunette grow insecure as the lost child she once was... but she said nothing to Natsu, nor to anyone else, her actions were betrayal engraved with fire on her skin, to let them know who was responsible for her sleepless nights and the bruises on her body meant to betray everything Fairy Tail stood up for.

I'm like your dirty little drug
And you never get enough
Said you didn't want it but you're in a sick and twisted affair
You won't be alone tonight
(A sick and twisted affair)
You won't be alone tonight

How could she tell them? How could she face her family, gather the courage to look them in the eye and tell them that she was having an affair with the black dragon of the Apocalypse? With the very man who represented a threat to everyone's life!