The woman and her pastor, who had very limited understandings of the difficulty of healing the sexually broken, lived in a fantasy world where compassion overruled common sense. This leads us to a second problem our belief in redemption causes us - we tend to confuse forgiveness with compassion. Taken as the sole moral principle it undercuts our ability to articulate an ideal for human life. I would add that, taken alone, compassion devastates our ability to truly forgive those who have hurt us because compassion can make us reluctant to confront evil - and confronting evil is an essential element of forgiveness. Taken alone, compassion can also set us up to be manipulated by someone who hasn't really repented, who is only sorry to be forced to deal with the shame and inconvenience of having been caught.
Forgiveness never airbrushes reality.
Sometimes the answer to that question involves setting some pretty strong boundaries where very little trust is extended, encouraging loved ones to honestly acknowledge what they've done. That can make us compassionate types uncomfortable. But sometimes it's the only way the behavioral changes necessary for a relationship to be restored will occur. This is how God operates. He allows us to face our consequences so we will grow up and make better choices the next time.