Ballet Shoes/YMMV


 * Values Dissonance: The book, published in 1937, uses a lot of language like "not really sisters" and "not your children" that many modern adoptive families would find heinous.
 * Possibly- in a further example- the constant underlining of their origins, and never referring to Sylvia as their mother- is because it's preferable to anyone thinking that Miss Brown's daughters are her own, and illegitimate..