Prompt: 126 - Infected
Word Count: 209
"You've got it all wrong!" Peter scrambled away from Remus, eyes wide with terror. "I never wanted to--"
"If you didn't, you wouldn't have ran. But you did, and you know what? That tells me you're guilty." Remus growled. "You know, if you hadn't, Sirius's name would've been cleared, he wouldn't have been caged in his own home, and he would still be alive!" He whipped out his wand, sparks shooting out at the end. "He would be alive! Harry would have a parent! You took that away!"
Peter's eyes went wild. He stared at the wand for a moment before he spoke again. "I-I'm sorry, Moony!"
"Don't call me Moon--" Remus froze when a wave of pain seared through his arm. He cried out, stumbling back and dropping his wand, and fell to the ground. He clenched his arm, but jerked his hand back when he felt something warm and wet.
Blood.
He looked up to see Peter shaking. "I-I'm sorry...R-remus." He grounded out his name before taking off, leaving behind Remus.
Remus watched something silver glint as the rat sprinted away. Slowly, he looked down to his arm and cringed.
It was red, raw, bloody, and tainted--
--by someone he used to call 'friend'.