"Four days." He replies stoically and keeps on cleaning his fur, once he's done with his arm, he chaos controls to the bathroom and cleans the towel, just seconds after he's back and sits next to him, and starts cleaning gently the side of his face too.
"The only one that could hate you that much... would be the same that helped me in finding you. It wouldn't make much sense..." Shadow is really talking more to himself than explaining Sonic. Not that he minds on Sonic knowing Mephiles helped, as long as he doesn't know the little price he had to pay. He doesn't know that there is another shadow around the building now. For some reason it just doesn’t click to have the Mephiles he knows, doing something of such nature to the Hedgehog when he would be able to kill him anytime during his sleep.
"Sleep..." He repeats this time softer, as he leans over Sonic and starts cleaning the other side of his face.