Dark is Mark's older brother and is the only family he has left because their parents were killed in a fire and Mark was still to young to go live on his own and Mark was also a little which Dark knew because he had told him trusting him away more and Dark happily took mark in with his boyfriend Lucifer and Lucifer was happy to have mark at his house and he knew Mark was a little to because he was told before Mark came to live with them...start from there
