Father of my great grandmother Maria Alejandrina Casanova - Hatillo Puerto Rico

My great grandmother Maria Alejandrina Casanova was born around 1861 in Hatillo Puerto Rico to her unmarried mother Margarita Casanova Garcia.Margarita had migrated from San Miguel de Abona Tenerife Canary Islands with her mother Maria Dolores Garcia Garaboto, her sister Maria Eugenia Casanova Garia, her step father Jose Cano Tacoronte and her half brother Fabian Cano Garia.Margaritas's father Pedro Casanova Rodriguez died in 1945 and his widow married Jose Cano Tacoronte who also had four children out of wedlock with his wife's niece Maria Donate Garcia and he also brought them to Puerto Rico as well. Margarita died in July 1888 in Hatillo , single, leaving an illegitemate daughter, Maria Alejandrina Casanovo who married Ramon De Leon Hernandez and had my grandfather Bernardo De Leon Casanova and his siblings, Maria Agripina, Carlos, Julia, and Bonifacio.Maria Alejandrina died in February 1900 and in the death documents it does not show who her father was. This has been a secret in my family and I hope that someone might have heard the verbal story of what happened and who the father of Maria Alejandrina was.Any help would be truly appreciated.