Ever since you moved in the House of Lamentation, all the 7 brothers have grown attached to you.

Especially Mammon the 2nd born is a little bit in denial and tends to hide his feeling towards you. You're his type of guy.

Lucifer then assigned both you and Mammon to be in cleaning duty of the House of Lamentation

"Oi! You better not be lazy at cleaning, human! We need to clean this house properly before Lucifer gets mad!"