'...no,' Javert says, just as Valjean grins and says, 'sure!'

Which causes Javert to roll his eyes and step back, because not only does he not want sweat all over him - unless it's Valjean's - he also does not like children.

Valjean, on the other hand, does. He doesn't have any experience with them, but he's just the natural father type. He holds his arms out to the little girl with an openness rarely seen with an adult.