Peter sighed lightly. "I can't do that right now. You're displaying a lot of hostility, and you are armed. I have residents here that are under my protection, and I will not bring an armed man in proximity to them."
Slowly, he lifted his own hands, to show that they were empty. "I am not armed. We were contacted by Ron Weasley, who begged that we bring Ginny here for her protection. Lavender Brown made a direct request to Peter Evans to bring Ginny here." There was that card being played. Ginny had only seen Peter's alternate face - it could be useful now to keep Evans anonymous and use his own name.
"Three of our own, including Lavender, are currently en route to help Ron escape. He's being held by an extremely dangerous man. I understand that Ginny is a capable witch, but Peter, in good conscience, couldn't leave her to her own devices. Lex Luthor is a powerful man, and would have sent several extremely capable men to harm Ginny, or worse."