Tony was definitely in need of a break. He'd gone from helping out in New York to getting JARVIS working on finding Tom Sully, and back to New York to help look for Tom and back to the surveillance room about ten times since it was discovered that Tom had gone missing. He figured at the worst case scenario, Tom would be brought back to the island when the door closed. Alive and happy and well. At least he hoped.
Of course when he came downstairs and found AJ dancing around as she cleaned, he couldn't keep a smile off his face. It was so adorable. He just stood at the elevator doors watching her dance and thankful that JARVIShadn't announced his presence.