Everywhere I've heard that one preached, The Lord is looking after that one lost sheep, bringing it back to the flock. As far as I know, he didn't throw it to the wolves or cook it and eat it.
God is responsible for this woman's salvation. This church has proclaimed the gospel to her. Did you forget about the part where Jesus commanded his followers to shake the dust from their sandals as they leave those that won't accept their words? The church is a body of believers seeking a relationship with God. And part of that relationship is acknowledging His lordship. Seeking His holiness. Repentance of our sins. And an effort to put away our sins.
We all sin.... but the church is not commanded to populate itself with unrepentant sinners.