When Winnie's parents realized how close they came to losing their child (when she ran away and the subsequent events), they began to communicate more openly with her. After she was found in the jail cell, she was returned to her parents' custody. At that point, I believe, she could explain her actions to her parents and be listened to seriously and with understanding. Soon after, Winnie's parents closed up the house, and the family was seen leaving town in their car to do some travelling. I believe, since Winnie never did drink the water Jessie brought her, the family bonded and shared a much more meaningful life. In the end, Winnie's tombstone revealed she returned to the town of Treegap, married, had children, and died at a ripe old age.