Sirius quickly drew his wand. “Expelliarmus!” He made sure not to knock her off her feet. He caught it and held it out so she could take it back. “But battles are not the appropriate moments for it. Believe me!”
“See, we are different there. You think it won’t happen again and I rather want to make sure it doesn't.” His trust in his friends had been a bit strained lately. He had never thought that one of his friends would betray them but obviously Peter would. That made trusting harden. James and Lily were of course exceptions. He would never ever not trust them.