I read this story a long time ago in one of our class readings. It keeps coming back to my mind but none of my Internet searches return a story except for news articles. The story goes like this:
A number of children from poor families are playing together. A rich couple gets down from a cart, approaches the first family asking if they would let one of their children be adopted in exchange for a handsome amount of money; the offer gets rejected.
Then they approach the second family, where they readily agree. This family gets repeatedly scorned at by the mother from the first family for long time who continues to say, "I did not sell my child".
After many (20 or so?) years, while the now grown up non-adopted child is returning from heavy laborious work, the same cart returns and now the adopted child, well groomed, gets down to bring presents to his biological parents.
Enraged that what should have been his life, the non-adopted son gets angry with his parents, yells at them and while the mother still repeats "I did not sell my child" and leaves them (permanently or temporarily? I'm unsure since the story we had was supposedly just an excerpt).
Does this ring any bells?