Now that Severus could see the boy up close he realize that the dark-haired boy really did look like James Potter, but there was more. He blinked, looked at Lily then at the boy, those eyes, the boy had Lily's eyes. He would never forget the first time he saw those beautiful green eyes, they were still very young then, even then those eyes captured him. It was really scary to see someone else, a boy, with those eyes, and not just any boy, a boy that looked like Potter.
He squeezed Lily's hand to let her know he was there for her and for now he tried not to glare at the 'intruder' but he probably failed.