Complex sentence: This injury complicated her economic situation, as her boxing provides the only income for her adoptive family, namely Quique and his mother, Maria de los Nieves, who loves Esperanza like a daughter and won't stop at nothing to get her to marry Quique.
Split into simpler sentences: This injury complicated her economic situation, as her boxing provides the only income for her adoptive family, namely Quique and his mother, Maria de las Nieves. Nieves loves Esperanza like a daughter and tries to get her to marry Quique.