Jude Law and Sienna Miller may be doing a fine job acting on Broadway, but they’re doing a terrible job covering up their rekindled affair. The on/off lovers, who split in 2006 after Law was caught cheating with his children’s nanny, were spotted canoodling again at The Box on Sunday night. A spy reports, “They spend every night in the same place together, either his place or her apartment. On Monday they went to Minetta Tavern for a romantic dinner. They seem a little more relaxed about being seen together.”