There's one girl (Bree*) who's sixteen, pregnant via rape, who is interested in Emmett (who for the purpose of the story, wouldn't be married to Rosalie).
One girl (Hannah*) had a crush on Sam until she learned about what he was and why he was with Emily, and is friends with the aforementioned...
-Ups and downs in romantic relationships
-Homer and Marge's love story
-Marriage
-Large sibling disagreements/rivalries
If you can link me to episode names and quotes that'd be brilliant :)