。
She listened intently to the boy's story.
Literal
She [topic-は] that boy [genitive-の] story [target-に] ear [object-を] inclined.
耳を傾ける (lit. 'to incline one's ear') is a set phrase for attentive listening — it conveys not just hearing but a deliberate posture of giving someone your full attention. The に marks the target. Used metaphorically for taking advice, listening to confessions, or genuinely engaging with what someone has to say. The phrase carries a warm, respectful tone, often appearing in contexts of empathy, counseling, or thoughtful conversation.