Sirius had a cold. So far as Remus was concerned, though he did want his lover to get better, this was also his chance to return the favour of all the times that Sirius had looked after him around the full moon. He had snuck into the kitchen to make soup the muggle way, and convinced Lily to enchant a cloth to help warm up or cool down Sirius where necessary. Sirius had been trying to complain but he was far too weak and he had finally lost his voice. Remus tucked his duvet in, and carried on regardless.