Five-teen?

Lately, Hope thinks she's all grown up. I don't know if it's because she turned 5, because she's moving on from preschool into kindergarten, or what. She prefers 'drop-off' play dates now instead of the kind where I "tag along." When I asked if she wanted me to cut up her pizza for her, she responded "I'm not a little kid!" (Um, excuse me ... ?) And she even pointed out to me that she's getting hair on her legs "just like a teenager!"

I know I've lost some cool points with Hope lately because we've been working hard on teaching her to stand up for herself when Grant is aggressive toward her. Rather than running straight to me, I want her to assert herself and then come to me. She's making progress (and so is Grant) but it's frustrating for her when I say "don't tell me, tell Grant." She's also grown so much recently, that I'm occasionally having to remind her that when she's rowdy and rough with me, she can actually hurt me. And once today, I actually had to tell her not to roll her eyes at me. What is happening here?!