He tilted his head back against the chair, gazing up at the ceiling. He knew -- logically he knew -- that he reacted to anything involving Snape a hundred times worse than if it was someone else. However, he didn't think he was completely out of line to question whether or not it was a good idea for her to spend time with him. Former best friend or not, Snape was bad news and she had cut ties with him for a reason. Sirius was of the mind that those ties shouldn't be repaired.
"I don't understand it," he muttered after a brief moment of closing his eyes. Pete was one of his best mates, but there was no way he could be in the same room with him now without trying to murder the traitor. Okay, so Snape hadn't (to his knowledge) gotten any of her friends killed, but who knew what he was really doing in his spare time.
"But I don't have it in me to argue anymore," he admitted, sounding tired. He lifted his head to regard her, sighing heavily. It was an effort not to launch into why he didn't think she should trust Snape, even though he didn't even want to get into it.
"How old is he, anyway?" He asked instead, pushing himself up and out of the chair to fetch the crisps.