Jaime and Cersei - Luke and Leia
-Both twin brother and sister
-Mothers both died by child birth
-Both showed attraction to each other (Even though Luke knew incest was a big no-no)
-''Help me Jaime Lannister, your my only hope''
-One is royalty the other took holy oath not to marry or love and whatnot
-Jaime lost his hand
-Etc...