Sensiblytainted

Severus' forbidden love was Lily. She got pregnant while they were still in school, and they decided to send the child to an orphanage where he would be safe. When Lily got pregnant again in her seventh year, she left Severus, unable to give up another child. She lengthened her pregnancy and seduced James Potter. Harry was born; James ignorant that he isn't the father. Harry becomes the Boy-Who-Lived. The Dursleys took him in reluctantly, but financial problems lead them to sell the five year old. He is taken to the black-market in America. Barely surviving, Harry escapes the black-market with no memory of what happened to him, two new personalities, and a protective older brother.