He didn't think she was damaged- not by a long shot. However, this time, Tony managed to bite back that automatic response and remained attentive to what she was saying instead of giving his opinions and input. That all could be done later.
Tony waited, his expression that of quiet understanding. A person could end up splitting into multiple personalities for a variety of reasons. While he had no experience working with how mutant powers could cause something like this he still understood the devastating effect it could have on an individual.