Some of the things she said reminded him of Mimi DeLuca which made him wonder if his family was descended from Gallifrey. That would probably be far too easy of an explanation though and nothing in Michael's life was ever easy.
"Lava, ice, and mold do not sound like fun beaches," he said. Not that he was a big beach guy, having spent the majority of the time he remembered in Roswell. "So I guess I can understand why people would prefer the ones on Earth."