How does Katniss' attitude towards Peeta change?

Katniss begins to see two sides to Peeta. She sees his kindness in cleaning up Haymitch and his vomit but she also sees Peeta working the crowed at the Capitol. She sees him schmoozing for sponsors in a way that Katniss has no idea how to begin doing. Katniss wonders if Peeta is really looking out only for himself after all. She sees that Peeta is already adept at playing this game.