Him calling her a child got another physical reaction: the guarded anger turned into anger outright and her jaw was being clenched so tight it couldn't be comfortable (it wasn't). She made the conscious choice to move her hands so she was gripping the edge of the building rather than clenching her hands into fists. He was talking down to her and digging at her pride on purpose, that little amused expression told her that much.

"Not all'f us'r the kind that hide behind masks like some liar. Some'f us live whatcha see's whatcha get." Which, she realized as she said it, may not necessarily be the best. Even if she might agree with him she still had to argue, though. It'd become a point of protecting her own ego.