When Anaya returns to the woods and sees her father, she signs to him, "I'm sorry, Mom." However, this is evidently a sentence and a question: "I'm sorry. Mom?" as the father turns and shows Anaya the grave.
When Anaya returns to the woods and sees her father, she signs what is supposed to be "I'm sorry, Dad." The sign she uses for Dad is actually the ASL sign for "Mother/Mom."