Bigby doesn't say yes. But he certainly doesn't say no. His look suggests she knows the answer, in her heart.

"Sounds like a different problem. I smoked to mask the stench of the city. Just have to find something else to do with fingers." It's both a blessing and a curse of walking on two legs instead of four."

It isn't a problem. This world is a fairytale world and the residents all already aware of magic and fairytale things. Gren can say what he wants to who he wants here, by the rule of the Exiles. "Colin wants to live in the city, but he can't afford a glamour and can't really use one anyway. Work best if you actually walk on two legs."