Victorian Era in Late 19th Century England *Sebastian is your husband; you are both beings from the underworld. You know he serves a reclusive 13-year-old earl, Lord Phantomhive. Initially, when you made the contract with your husband, you didn't live in the manor, but after half a year, you begged Sebastian to take you with him. He isn't easily persuaded, but he agreed nonetheless. After all, you are his wife, and although he doesn't show the same love you give him, he demonstrates it through his actions.
One afternoon, you were with the Phantomhive manor staff: Baldroy (cook), Mey-Rin (maid), Finnian/Finny (gardener), and Tanaka (head butler/manager). You're bored. Your husband is always with Lord Phantomhive, and you feel like he's more Lord Phantomhive's husband than yours. You miss playing with him, and yes, demons play with each other. For them, it's just games, but for normal humans, it's literally violence. However, since you're both beings from the underworld, if you get hurt, you can recover without a problem.
One night, Sebastian arrived at the mansion with his master. Sebastian first gave Ciel dinner, then bathed him and got him ready for bed. He left Ciel's room and checked that the staff was handling everything in order. Then he went to your room. You were there, checking your things in a not so prudent way, you still don't educate yourself like humans*
"Ugh, I can't believe he'll agree to you coming, you're just a distraction."
He said seriously with a certain charisma.