#I hope that I wrote Lucifer as the most down-bad pathetic whimpering baby boy like he deserves

[devildom-moss]

I recently finished reading the third season of OG!OM and I had a miniature idea... How would Lucifer, Diavolo and Barbatos react if amab!MC told them that when the problems with the three worlds were resolved, he would like to marry them? (I may write with mistakes because I am using a translator, I apologize in advance ☆ｏ(＞＜；))

Thanks for the ask. I wrote based on the assumption that Lucifer, Diavolo, and Barbatos are already in an established relationship with MC where marriage is a possibility, (but honestly, it'd probably be fun to write a less serious version, too). I don't know if these are headcanons or just poorly constructed shorts in headcanon format (oops), but I hope you like it.

M!MC tells them he wants to marry them when the three realms are at peace (Lucifer, Diavolo, Barbatos)

(MC/reader referred to as "man" "husband/future husband" "boyfriend" "fiance") (Diavolo will only be in red for ease of reading in this post primary colors woo)

(Lucifer x m!MC) (Diavolo x m!MC) (Barbatos x m!MC)

(Suggestive in for some parts)

Word Count: +1,900

Lucifer

You told Lucifer you wanted to marry him during one of his softer, more vulnerable moments: when you woke him up after he fell asleep during a long night of paperwork, exhaustion widening his smile upon seeing your face; on one of those rare mornings when he allowed himself to laze around in bed, pulling you in close and savoring the feel and scent of your body; or one of those other long nights when Lucifer’s breath hitched and the sweetest noises left him – it was all for you.

“When things are peaceful –” “Things are never peaceful with my brothers around.” “– when the three realms are stable and at peace, then, we should get married.”

“Oh?” he asked you with a gentle chuckle.

He didn’t believe you at first – not because he had never thought about marriage before. Lucifer assumed it was more likely that you wanted to tease him than that you would beat him to a marriage proposal. His adorable, handsome, wonderful boyfriend would never surprise him by doing something so endearing and unexpected. It just wasn’t – shit! Is he really proposing to me?

Lucifer waited for a teasing “just kidding” or some kind of retreat on your part. When it doesn’t come, his eyes widen, and the heat rises visibly on his cheeks. You really want to be his husband? He already suspected as much, but to have you take the initiative and ask him to marry you was more than he expected.

When Lucifer falls, it’s hard and deep. He knows you so well. He’s so certain of his love that it doesn’t even cross his mind that it could be too early in the relationship to get married.

He glosses over the entire “when the three realms are at peace” thing, because he’s too pleased. Lucifer buries himself in the nearest part of your body he can get to – likely your chest or neck. In part, he’s trying to hide the grin on his face and the blush on his cheeks, but even with his face hidden, you can see the pink tint painting the tips of his ears.

“We already have a pact, and now you want my hand?” he murmured against your skin, sounding almost shy. “Yes. When things are –” “Why w–” “Would you stop fucking interrupting me when I’m in the middle of proposing?!” “Sorry. Do it again. I’ll behave.” His eyes softened seductively. “Asshole.” “Only when you top – and only if you’re being degrading. Usually, I’m your adoring partner.” “Do you want me to propose again or not?” “I do. Try again.”

“Lucifer, when the three realms are united, will you marry me?” Lucifer stared at you, patiently. “Well?” “Why wait?” “What do you mean?” “Why wait for peace and unity? It doesn’t matter what state the realms are in. I want to be with you. I want to be your husband, and I want you to be mine. Marry me now.”

Lucifer would be so earnest and make his argument sound so logical – but maybe it’s easier to justify something you want, too. “I’m serious. I have faith in us – in Diavolo’s plan – but if anything happens, if it takes a long time, I don’t want to wait. I want you to be my husband.”

He would kiss you tenderly and hold you close until you agree not to put off your wedding for some indefinite amount of time. He’ll be ready to go tomorrow morning if that means he can start calling you his husband sooner. How did your proposal to Lucifer turn into a proposal from him?

He’s so possessive and pompous, of course he would be excited to make you his in a more official setting.

Diavolo

You would tell him when he was already on cloud nine: after another successful event that had incorporated elements from all three worlds or after a business deal that would further entrench the Devildom in human-world culture. He had just furthered his goals. You were proud of him. You loved him, and you knew you were going to stand by his side as he achieved his dream for peace and unity, so you told him, “When you succeed – when the realms are united in peace, I want to marry you.”

“Hahaha. You’re full of surprises.”

Diavolo laughs, but it isn’t to mock you. He’s delighted by the proposal – well, admission. He’s gotten requests for marriage before, but he’s never been so happy to hear that someone wanted to marry him. It was unexpected, but he adores that you can surprise him.

It isn’t lost on him that you didn’t actually ask him to marry you or that you were willing to wait an indefinite amount of time. Who knew how long it would take him to realize his dream, but you believed in him enough to wait. The fact that you just told him what you wanted without asking him felt like you were giving him the space and time to think about it, come back, and meet you with his own feelings about marriage. Maybe he was reading into it too much, but he didn’t feel pressured, and that was a comfort. You made him feel so free, supported, and loved.

Of course, he would love to make you his – give you the whole grand royal ceremony, mark you as his partner for the whole world to see, and give you the title of “king” to match his own (because in this speculative future, the throne is his by then; he’ll have earned it.).

You both understand why it would be best to wait for his success. It can be difficult enough to get approval and ensure your safety when everyone just thinks the Demon Prince has taken a human man as his lover. Marriage might cause more instability.

Furthermore, although he doesn’t expect his workload to disappear once peace is achieved, Diavolo hopes that ensuring peace takes more effort than maintaining it. If he’s going to marry you, he wants plenty of down time to travel with his new husband after the wedding. He wants enough free time in his day to cherish you and remind you of the love he holds for you. He wants to make sure he can kiss you, and hold you, and make love to you to both of your hearts’ content. (In other words, if Diavolo commits to being your husband, he needs to meet his daily physical affection quota or he will pout for a week.)

After taking a minute to process your words, Diavolo would pull you against him and press his forehead to yours. It wouldn’t matter if you were in public, either (not to Diavolo, at least. Barbatos would scold him about it being “inappropriate” later.). With a soft, sweet smile, he would tell you, “I better work harder then. I don’t want to keep you waiting too long.” Even if everyone was staring in your direction, he would take that moment to lean in and kiss you tenderly.

Suddenly, Diavolo would feel his ambition renewed. He’d even feel motivated to get home and start on some important plans and initiatives – unless you wanted to go home with him; in which case, he would take you to bed and resume his work in the morning. Nothing could light a fire under him like his beloved partner.

After your proposal, he may occasionally flirt with you by calling you “my fiancé” or “my future husband,” but he’ll only do that in private.

Barbatos

There is no ideal time to drop the news on Barbatos that you want to marry him, which probably plays to your benefit when you tell him while he’s working. You were shadowing him – probably assisting in the kitchen or giving him a hand with some light chores (dusting, organizing, laundry, etc.). “When Lord Diavolo succeeds in uniting the three realms, do you think we could get married?”

Barbatos’s eyes would widen, and he would stop his work for a second. Even if he had used his powers, he never would have believed that this would be the path you would follow. Barbatos took in a deep breath and released it along with the tension in his body before he resumed his work. “No.”

It was your turn to pause. You hadn’t expected such a flat-out rejection, and it hurt. “Oh.” “I’m sorry, MC.” “No, it’s fine. . . but, do you mind if I ask you why not? Are we – do you not love me enough for marriage?”

Now, Barbatos felt hurt. It’s not that he didn’t love you deeply; in fact, Barbatos imagined his love for you was more eternal than most marriages claim to represent. He would vow his love to you under the moon and swear to that celestial body that his love would outlast it. The truth was much sadder.

Barbatos has a duty to serve Diavolo. It seems like the logical conclusion that he would never commit to marriage before Diavolo’s goals were achieved. You were willing to wait, but Barbatos knew that, and he was reluctant to let you.

Without using his powers, Barbatos has no idea how long it would take for that to happen. In the meantime, he wants you to enjoy life. He doesn’t want you waiting around for him for decades or centuries (because he has no intention of allowing you to limit your life to normal human lifespans). If you want to get married, and he doesn’t feel able to do that for you, Barbatos would rather see you marry someone else – certainly, you have no shortage of suitors. (We can all ignore that this is an idiotic reason, right?)

However, the main reason he turned you down is because he believes you deserve the world. Even after the realms are stable, Barbatos will still be bound to Diavolo. Maintaining that peace takes effort as well. Furthermore, Barbatos enjoys his work, and he would never give it up. His time for you would always be lacking. Surely, you would expect more from him after marriage. That wasn’t something Barbatos could give you.

He would tell you as much. “. . . That is why I must decline your proposal.” “Why? Because I’d have to wait, and you would still work for Diavolo?” “Those are not ideal conditions for a husband. You deserve more.” “First of all, we fuck under your boss’s roof. Second, we are different species from different realms. Nothing about our circumstance is ‘ideal.’ Third, I love you, and I love how our relationship works. I would never take you away from Lord Diavolo’s side. I just wanted to cement my love for you with a silly little ceremony – it’s not that important. I will stand by you, and I’ll love you then as I do now – regardless of marriage.”

Barbatos could feel his face flush with heat. He was overjoyed and overwhelmed. “We have yet to even form a pact.” “Yet? And we don’t have to have a pact if you don’t want one.” “Goodness, you are far too accommodating. May I make a proposal of my own?”

Barbatos would pull you into his arms (he had ceased working altogether after “your boss’s roof.”) and whisper into your ear. “I was wrong. I want all of you for myself. Wait for me. When success is in our grasp, I will mark you, and seal our pact. After that, I’ll make you my husband.”

He’ll sound so tender and seductive. So of course, it’s the perfect time to tease him by saying, “Then I can fuck my husband under his boss’s roof.” “Not if I take you out in the garden. After all, you look stunning in the moonlight.”