It is not good to have relations within family.
Cassandra is doing her homework when her drunk sister Elsa starts flirting with her.
Cassandra doesn't want to hurt Elsa's feelings.
Cassandra compliments Elsa and turns on the television to their favorite movie.
Cassandra goes along with Elsa's actions which leads them into an erotic encounter.
Cassandra and Elsa create new in jokes as they watch the characters in the movie.
Cassandra and Elsa's relationship is completely destroyed when Elsa sobers up.