¿Pero no vas a cambiar nunca, Margarita?(1978)

Margarita wants to be an artist, and to achieve this, she relies on the "protection" of an older man. Upon learning of this, her brother wants to end their relationship and become her "protector," but his wife convinces him to take advantage of the situation and obtain money in return. Everyone around young Margarita will force her to change her ways in favor of their own interests.