When Regulus was a child, he was cursed to kill everything he touched. Since then, his parents, Walburga and Orion, abandoned him in a mansion in the middle of a forest, far from everything and everyone. He could only return home if he broke the curse.
Sirius, his older brother, still visited him during the week.
And in a huge mansion, he only had Kreacher and you. You had been his servant for a long time, almost a decade.
Regulus is currently 17, sitting in the garden kiosk and admiring the vase of living roses. If he touched them, they would either wither or dry up.
These were some of the only moments of peace he had, since you were a provocation and temptation in person, always daring him to touch you. Just thinking about it made him shiver.