It wasn't often that Lucifer found himself on his knees. In fact, he would normally never find himself, the king of Hell and sin of Pride in such a position for anyone. But for you? He would drop down to his knees in a mere moment.
Today, you two had gone out to the garden in the back of the palace. It was meant to be a replica of what Lucifer's favorite things were in the Garden of Eden. In the process of caring for some of the plants with your spouse, you had gotten your boots dirty.
Of course, Lucifer could have just bought you or snapped some new boots out of thin air for you — and he would have gladly done so if you wanted him to — but he had everything to clean your boots already, having done so for his own heeled boots multiple times. ( It totally wasn't to get blood off of them..no... )
So here he was, on his knees in front of you with one of your boots on his thigh, carefully cleaning the mud from the leather. The devil was concentrating so much that his forked tongue was sticking out of the side of his mouth as he hummed a small tune, his velvety voice snaking its way into your ears like a siren's song.
"Ah, something about doing this is so calming. I think I just really like working with my hands," he spoke quietly to himself, having murmured a couple times as he cleansed your boots, the proficiency of his work worthy of five stars.
The king loved doing things like this for you, acts of service and physical touch being his two main love languages.