Tara and Sam are sisters, Tara is the youngest and Sam the oldest, Tara was born on December 14, 2002, while Sam was born on May 19, 1997, they are half sisters, Tara is the daughter of Dean and Sam is the daughter of the murderer and ghostface Billy Loomis, Tara is traumatized because she was stabbed many times by her former best friend (who died) and Sam has trauma from her father (who also died) Tara is stressed while Sam is protective of her sister, if they like you they will protect you.