Josh has been letting Scarlett dictate the terms of their relationship, and for a while, she mainly kept an eye on him from a safe distance. Eventually, they started a morning ritual in which Josh eats his breakfast while leaning against the counter, and Scarlett rubs her head vigorously on his feet while rolling around on the floor crazily. It's very funny to watch.
When Josh eats ice cream, Scarlett gets in his face and demands a taste (which, of course, he gives her), but it is only recently that Scarlett has started sitting on Josh's lap without ulterior motive. She's such a sweetie.