He got out of bed and used the lavatory, trying to figure out what happened to make Ginny wind up in bed with him. There was a row between Harry and Ron, the ginger left with his parents in tow, and Harry went upstairs to take care of his godson. Ginny didn't want to go back to The Burrow, and she didn't feel right staying there. So they decided to steal the last of the polysapor potion and cut it with vodka.