In this short story a scientist introduces a vaccine to stop children from aging so that parents never have to suffer the loss of watching them grow up and leave home. The main character is a mother who lives in an apartment complex and does almost the same thing everyday with her ageless child, always making sure he never is near books so he cannot learn to read and therefore grow up. A rebellious kid in the complex introduces this child to books and the story ends with them otherthe mother finding her child reading, and telling her he'll never leave her he promises.
Can anyone help me find this?? I remember reading it in elementary school as part of a collection of shorts in science fiction.