Answer:
She feels like a turncoat because she is taking Nell to the orphan house.
Step-by-step explanation:
She feels like a turncoat because she is taking Nell to the orphan house. Mattie is not a traitor because Nell is not her child and is going to end up at the orphan house. It was Madam Smith who advised Mattie to take Nell to the orphan house, at first Mattie did not want to take Nell to the orphan house, she loved her and took good care of her and felt that at the orphan house no one would take good care of her.