Mary was beginning to get very frustrated with how her son was behaving and how he was being completely disrespectful to her and whatever force was keeping her docile had been broken at least for now. "Listen to me young man, I will not have you talking to your own mother like that." she says in a loud but not yelling voice while keeping a stern tone.
Brandon's own eyes go wide when he sees this and his mouth is agape in shock. He can't quite formulate a way to respond to this outburst his mother just had.
While he tries to collect his thoughts, the changes to him continue onwards, his arms begin to lengthen into their new adult dimensions even though they're still topped by his smaller, boyish hands which looks really odd but will fix itself in due time. The skin that's on these arms is smooth, soft, and delicate and almost unable to grow any hair.
Mary notices this and she realizes that something is really wrong with her son and she needs to figure out what it is she can do to fix it but her thoughts are interrupted by how Brandon reacts to her outburst.