Aunt Crete's Emancipation by Grace Livingston Hill

Aunt Lucretia — 'Crete' to her family — is a sweet, patient older woman, who lives with her narrow-minded sister and spoilt niece, acting as their unpaid and unappreciated domestic servant. When they leave town in order to avoid the unexpected visit of a "backwoods" cousin, she is left at home to welcome him. She's willing to love him whatever he's like, and he's looking for a home having lost his mother years before, so the two are ready to become fast friends. But what does that mean for Aunt Crete's prejudiced relatives and how can their wrongs against her be remedied? - Summary by Cori