Review of The Wrong Daughter

I was okay with the movie until the last few minutes. The script had the real daughter calling from the group home from the director's office to the mother. Why didn't the director take the phone and tell the real mother about the imposter? No wonder the mother didn't believe the girl. Also, if the director was suspecting that Samantha was up to no good, why didn't she call law enforcement? That section was a little hard to believe.