Regulus seemed quite childlike, fingers playing against the edge of his robes in a manner that lie in contradiction to his upbringing. Lucius remained where he sat, hands laying calmly against the cool exterior of the piano lid.
Lucius gave a nod as he referred to Draco, "Yes, he is my son." It was most curious that Draco had neglected to inform their new guest of Lucius' reappearance in the world. He stood slowly, withdrawing the stall and standing to allow his robes to fall neatly. The stall was replaced with meticulous care, before he rose to his full height and met Regulus' eyes again.
"When the Dark Lord was defeated for the second time at the cost of his life, Death Eaters were rounded up. There was little chance for reprieve, and whilst Draco and Narcissa were vouched for by the very boy who had defeated Him, my crimes were seemingly too great for even Harry Potter to smooth over," Lucius walked around the piano, to stand closer to Regulus "I was sentenced to The Kiss, but took my own life before justice could be served."
He paused two feet or so from Regulus, "However, my last memory is of the day Draco was born. One moment I was responding to the Dark Mark, the next-" Lucius indicated the room with a quick gesture, "I am twenty six. My son was merely hours old and my wife..." he paused, eyes narrowing slightly as he looked at the man - hoping he had not come into contact with his cousin. "Narcissa lives."