She likes to stare at him whenever she can. Most of the time just seeing him makes her smile and smile. In the car she stares at him, while he plays she stares at him, and she's even nice enough to cry whenever he cries. And like any good stalker, she just likes to be near him.
Luckily he doesn't seem to mind too much (most of the time).
This girl likes her brother A LOT. He's still kind of scared of her but lately he's been warming up to her. He is getting so he is ok with her being near him for longer than 2 seconds. She's pretty scary.