Ana Colchero in Corazón Salvaje (1992)
Not all villains need to kill and steal to have a spot on our top 25 list. Aimee only wanted Juan Del Diablo (Eduardo Palomo) to fall in love with her. When she thought he was dead, she married his cousin. When Juan returned, Aimee went after him again, but he instead he married Aimee's sister, Mónica (Edith González). Guess who tried to break up that marriage?