-- It could also be used of a pet, a movie chararacter, a friendly neighbor, etc. Circumstances will dictate, however, as to how appropriate it may sound. -- This is a very poor example sentence: there is no context, so 'win her heart' could mean almost anything, like 'eat her sandwiches', for instance.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.