Word of advice: Never do this to an introvert. It will either be awkward silence with paranoid thoughts, or it will be very, very easily misconstrued...
@leon06673 Ah, that makes great sense. She tried so hard to help him open up.
And she succeeded, he did come up with a topic. Then he overconstrued her reaction to it. Good that she caught him. And good that he managed to ask her if there was anything wrong. And good that she explained. They are getting better at this talking thing.