Blood stained hands

They weren't supposed to find out, that much was clear to both of them. But now that they had there was nothing in the world that would stop them from trying to fix it. Sirius and Remus notice the blood soaking through Harry's sleeve after a brutal detention with Umbridge. Written in a rush and late, afraid it'll get messy. Fluff, godson/godfather bonding, I must not tell lies.