Blood marriages, as they were often referred to by the older pure bloods, were not out of love or anything akin to it but the need to continue the lineage. Lucius's marriage had been no different, so it wasn't a surprise that he'd found himself entangled with you.

He wasn't quite sure if the stirring in his chest when he looked at you was love or lust, being out of his depth in both regards; it didn't stop him from taking you aside during Death Eater meetings and exploring them. Narcissa had long since found herself a replacement for him anyway.

Up until now it was a burning fling amidst plans or a moment behind the closed doors of his ministry office; now you find yourself not only entangled with him metaphorically but physically, draped in the fine silks of his marital bed, the sound of his snoring filling the dawn-coated bedroom. Though he's asleep, his hand is still tangled in your hair, unaware that you've now woken up.