40. Secrumsempra

"Well he's working undercover, we know that much," Sirius spat.
"He is not the spy. I trust Remus," Lily interjected. She didn't want her friend's name to be thrown around like this, and not in her own home.
"Lily, Lily, he's working with the wrong side. He's with them every day, underground. Who else could be giving away our intel?"
She rolled her eyes. "We are talking about the same Remus, right? He's loyal to us."
"He's a coward, and you know it."
Lily shook her head, but James interrupted. "Mate, we don't believe it's him. We trust him, just like he trusted us with his secrets."
"What, old Sectumsempra face? He's playing dirty, with new scars each month. Do you know the kinds of people he's gallivanting with? Greyback for one."
"He's on official order business. He's not giving away our information, he's getting theirs."
"He hasn't got anything!" Sirius roared, receiving a shush from Lily. Shaking the anger off, he continued. "Look, I'm just saying to be careful. Please! I don't want you to put your trust into someone that will betray you. It's a serious decision."
"What about you?"
Sirius shook his head. "I'm too obvious."