"You're-" Theo paused, that was more than he'd expected. "How long have you been in the order," he asked, because he did want to know. "And why did you decide to join?"
He shook his head at the offer. "I had Mimsy secure it before leaving," he said, turning to Pansy. "We can discuss that later," he said. "Once you have the memory back." He knew there would be no need for discussions then. Knowing what he knew now, he was glad he'd had something to hide and protect, since he might not have thought of running if he'd believed he was the only one with something to hide. Then again, he'd known about Azriel, and it was the Dark Lord, one never knew when he decided he'd rather want you dead than alive.
He did indeed have plenty of questions for Stephen, but most of them were best asked in private. There was one he could safely ask in the presence of Pansy however. "I take it this research has something to do with the Order," he asked. "Though you can tell us about it later, and thank you but no thank you, I'd say it's best I stay indoors for now." Mostly he could not imagine donning borrowed Muggle clothes. Or Muggle clothes at all. It was something he had only done on a couple of occasions when he absolutely had to. It was not something he preferred doing.