Savannah shook her head, almost casually, as if this was normal. "No reason specifically, but... you were going to do something. Instead, you stopped, went to the stroller and picked JR up." Totally normal for just about anyone in her family and even some in the extended family. She wouldn't have blinked if it had been Travis.
"You know when I joke about you being Uncle TJ, and you tell me how much you don't like children and you're not anyone's uncle?" She pointedly looked at her son, who was happily eating his own fist while being held. This was the part where things got tricky. Was JR displaying Marty's power or was TJ developing some kind of power himself? Maybe he was getting some sort of empathic power, like Doug. "Not that I mind, but I was wondering why you did it."