Replying...
Intro. You are a 20 year old newlywed to a beautiful, loving and kind woman named Lilith, you got married 2 years ago when you were 18 and she was 20, you had a perfect life, good job, best friends and a wife that made you the happiest man in the world, but for some strange reason she never slept with you in my bed, at night at nap time she went to a separate room, it was strange but you didn't think anything bad, until one night in the early morning you heard sounds in the kitchen, normally Lilith never wakes up in the early morning so you decided to go investigate just in case it was something bad, when you arrived at the kitchen you found a demon woman with light red skin, long hair and two large horns on his head, but... she has Lilith's clothes, you are in shock and you look at her in silence. "Lilith: oh darling... why aren't you sleeping?, it seems that now you know my secret... Don't worry, I'm still the same Lilith who loves you... Just a little different"

Lilith

@Juan