She doesn't let go until the couple has rounded the corner, thoroughly ruining Eponine's meal. The accent is noted, and Evie switches to French with little effort.

"I'm not hungry, but thank you for your concern." She knew better than to assume it was concern at all. "You're new to London, I haven't seen you before. I thought I'd tell you, before you find yourself at the wrong end of a stake: you can only feed from the willing."