Yeah, I'm sure it was Liam's soul he got. Just because by age 26 Liam had become a drunken whoremonger does not mean that he was basically an evil man. A weak man, perhaps, but not necessarily evil. His relationship with his father had led to the ruination of his character, but when we see a glimpse of eighteen year old Liam in Spin the Bottle, we see a shy, sweet lad.