She's not particularly bothered by their closeness - what did it matter? One was business - or she had thought it was. This was most definitely pleasure.

"What?" She smiles, completely relaxed for a change. "I like watering flowers. They don't grow where I live, but a little way outside the city, they are in abundance. It's calm there."

It's a place Eponine goes to remind herself that there is beauty in the world, and to get some peace and quiet from the noise and dirt of the city.