I asked Allah's Messenger (sallallaahu 'alaihi wasallam)said, "O Allah's Apostle! Should the women be asked for their consent to their marriage?" He said, "Yes." I said, "A virgin, if asked, feels shy and keeps quiet." He said, "Her silence means her consent."

Sahih Al-Bukhari Vol. 9 : No. 79 Narrated by Aisha (Radhiallaho anha)