" In her eyes, he could see the fear, but also the love. The need. Time to show her, that to him, she meant everything.
“Before you shower me with kisses for saving you –”
“I think it could be argued that I played a part.”
“Not when I retell the story you won’t. But we can argue about that later, naked. As I was saying, I have something for you.” Remy pulled the sheet of paper out of his back pocket and unfolded it.
Initially he’d worried about it being too short. But as Lucifer assured him when he made the contract and binding, the less clauses he put in, the more his promise would stick out. Handing it to her, he waited.
Fidgeted when she didn’t say a word. Almost tore it from her grasp. Then stumbled back as she threw herself at him.

I, Remy, the most awesome demon in Hell, do declare to love the witch Ysabel, fiery temper and all, for an eternity. I will never stray. Never betray her trust. Never do anything to cause her pain upon penalty of permanent death.
This I do swear in blood,
Remy

A simple contract, which in its very lack of clauses and sub items, awed her. “You love me that much?”
He peered at her with incredulity on his face. “Of course I love you that much. Would I have done all the things I did if I didn’t?”
“Well, you are related to a mad woman.”
“Yes, and maybe it’s madness for me to love you, but I do. Do you think just any woman would inspire me enough to take on a bloody painful curse. Or put up with the fact you have a giant, demon eating cat. I know you have trust issues, and that I might not have led the kind of life that inspires confidence, but I will show you that you can believe in me. I want you to love me.”
“I know you do. And I do love you. Only for you would I come to the rescue wearing nothing to cover my bottom.”
His eyebrows shot up. “You came to battle in a skirt without any underwear?”
A slow nod was her answer.
He grinned, then scowled. “You will not do that again. Do you know how many demons live in the sewer and could have looked up your skirt? I won’t have them looking at what’s mine. On second thought. Throw out all your underwear. I’ll lead the purge on the sewers myself so you can stroll around with your girl parts unencumbered for my enjoyment.”
“You’re insane,” she laughed.
“Crazy in love with you,” he agreed. “But I do warn you, we’ll have to have dinner with my crazy mother at least once a month.”
“Or more often. I quite like your mom. She’s got a refreshing way of viewing the world.”
“Oh fuck. Don’t tell me she’s already rubbing off,” he groaned, as he pulled her into his arms.
She snuggled against him. This was where she belonged. But she did have a question. “As my new… what should I call you anyway? Boyfriend? Demon I sleep with?”
“The following terms are acceptable to me. Yours. Mate. Husband. Divine taster of your –”
She slapped a hand over his mouth. “I’ll stick to mate.”
“And I’m going with my super, sexy, touch her and die, fabulous cougar, ass kicking witch.”
“I dare you shout that five times in a row without stumbling.”
He did to her eye popping disbelief. “I told you, I have a very agile tongue.”
“I remember. "

― Eve Langlais , A Demon and His Witch (Welcome to Hell, #1)