Of course she noticed right away -- for as energetic and excitable as Isabel was, she'd never been stupid. Still, it was probably just small favors that kept her from asking the obvious questions right away. Well, that and the cats. And possibly the confusion over modern technology. Levi had definitely been over his head when he'd shown up here -- although, really, Isabel seemed to be managing quite a bit better than he had.
"And your hair looks like a bird's nest," Levi countered when Isabel finally passed a verbal judgement onto him -- and made sure it was actually so by ruffling the hair at the top of her head before returning the hug with probably more enthusiasm than he'd ever done with before in his entire life.