Complex sentence: Lucía is a young noble, sweet and of good feelings that is about to marry with Rodrigo Zúñiga (Mariano Palacios), her boyfriend of all her life, but finds out her sister Nora is sleeping with Rodrigo after he leaves Lucia planted in the altar.
Split into simpler sentences: Lucía is a young, noble and sweet girl of good feelings that is about to marry Rodrigo Zúñiga (Mariano Palacios), her boyfriend of most of her life. However, she finds out her sister, Nora, is sleeping with Rodrigo after he leaves Lucia planted in the altar.