Ron’s bed was on the other side of Draco’s lifeless form. She peeked at him through her lashes and pondered; so now McGonagall and Snape also knew Draco was her soulbond. At this point she thought it was pointless to keep the secret from Ron any longer, it was only hurting him - especially since that was twice now he had walked into the fray between her bond and the Death Eaters.