This is not a common saying. That being said, the author is saying his heart 'fluttered' or beat eradically by using 'turning' instead of the usual description. (Likely to sound original), in other words; she makes him feel anxious.
31 de enero de 2015
1
1
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!