Beatriz Sheridan

Rosalinda is a pretty woman who sells flowers and decorates a fancy restaurant. One day, she meets Fernando José, a man of high social status. He plays the piano at the restaurant. They eventually fall in love, get married, and have a child named Erika, but his stepmother Valeria desires to split the happy couple up, and she has the perfect way of doing so. (Wikipedia)

Rodolfo Peñareal is obsessed with having a male child. After many miscarriages, his wife Blanca is pregnant again. One night, a girl is born, but they believe that she was born dead. In the same town, in another, more humble house, a boy is born, but his mother dies during labor. The midwife and the nanny of Blanca, with their best intention and with the aim to calm down Rodolfo, decide to exchange the children. (Wikipedia)

María Mercedes, a poor girl who sells lottery tickets, meets a rich man who hates his own family and sees in María Mercedes an opportunity to make their lives miserable. (imdb)

A poor girl encounters a wealthy young man and falls in love with him, but his family does not approve. (imdb)