。
Tears rolled down her cheeks.
Literal
Tears [subject-が] her [of-の] cheeks [object-を] flowed-down.
Uses 頬を流れ落ちる, with を marking the cheek as the path of motion. The compound 流れ落ちる ('flow + fall') still gives the downward-flow reading without needing the more poetic 伝う.