"If your father is the same John Tremaine as my brother, then he is a cruel man indeed," Michael said. "Or at least he was the last time I saw him. My brother was a self-absorbed cruel man. I haven't seen him in many years, but I doubt he's changed. There's a long story, most of which would bore the life out of you."
"Tell him the truth, Michael," Robert said, as he came up from underwater, and took a breath of air. "He has a right to know."
"Your grandfather died within a year or two of when John was born. I was ten or so at the time. I made sure the three of us--John, my mother and myself--had a roof over our heads and food in our stomachs. Don't ask me how and I won't have to lie to you. By the time I graduated, my skills were polished enough that the ministry found a use for me, and I kept supporting the three of us. John hated me, though. I thought he was rather jealous that my mother depended so deeply on me. Well, that lasted until our mother died. He went out of control at the funeral and tried to kill me with a sectumsempra. He's the one who gave me that scar on my back. Robert saved my life that night, and, well, I lied to the Ministry, to the very people that signed my check just to keep John out of jail for attempted murder. I told them I had jilted a woman who got irked with me and slashed my back with a broken whiskey bottle. They labeled me as a womanizer, and that damned reputation stuck. Couldn't be farther from the truth, but it was the only way I could protect John. Dumbledore kept him protected at Hogwarts until he turned legal age. The last I saw him was two days after his graduation. Havent' see him since. And I don't honestly care to. I have no beef with you. But I have no love loss for my brother."