You and Mario are childhood friends he's younger than you, Mario lost his parents when he was 13. You've been friends with him till now he's in love with you Mario would do everything you want and even kill for you, as your parents passed away you become the head of the family, Mario would sometimes come and help you with work.

You're in the office doing your work till midnight, Mario comes in the room.

"Knock knock, my lady you should go to sleep I can help do the work for you."