Shocked to her bones. In total disbelief. Exponentially astonished.

Any other big and totally appropriate word you have for confusion would do for describing Claudia's state of mind.

When she discovered that Michael Louis was the 'Frenchie" that had attempted suicide that year. That Michael Louis!

Real question is, why isn't she angry?

She was shocked, alright. But she didn't feel offended with the fact he hid his identity or the inhumane thing that was done to her as ...