What you hear may only be the tip of the iceberg. In time she may share more with you. Tell her that she is not alone. No one deserves to be abused. It is not God's intention that she should suffer and be violated.
All blame rests with the abuser.
She did not in any way cause this abuse. Affirm her faith no matter where she stands theologically. At this time of crisis her present faith stance may be the ONLY thing she has to hold on to. Offer her options in her search for wholeness. Give her choices within her faith stance as she searches for a faithful understanding of what is happening to her.