There's definitely a flush, and then a blush, because Vincent is fair enough that it shows. "Well, thank you," she says, because his smile is lovely.
And she quickly picks the subject of choice: Mr. Darcy. "He was my cousin's, but hedgehogs choose people, and he chose me, so I got him. You can meet him, sometime," she offers, her own version of a line, albeit one that's more bashful, less compliment, and more Vincent for you seem nice, I'd like to see you more often.