City of the Dead
"It may have fallen out of favour," he acknowledged. "Herondale, on the other hand, is melodic. Dulcet, one might say. Think of the sound of 'Clary Herondale'"
"Oh my god that sounds horrible!"
"We all must sacrifice for love."
In which Clary finally decides that 'Clary Herondale' isn't as horrible as she originally thought.
She quickly realizes that adventure, even more danger then she's already experienced, and children may be part of the Herondale package.