Complex sentence: She is also the niece of mob boss Sonny Corinthos, which makes her both half-sister and first cousin to Kristina, as well as the youngest granddaughter of Mikkos Cassadine and the step-granddaughter of Helena Cassadine.
Split into simpler sentences: She is also the niece of mob boss Sonny Corinthos, which makes her both half-sister and first cousin to Kristina. As well as the youngest granddaughter of Mikkos Cassadine and the step-granddaughter of Helena Cassadine.