SCPX-298 - My Big Sister Is So Prim And Proper That Whenever I Make Dirty Jokes Her Face Gets Deep Red She's Really Pretty But She Never Seems To Have A Boyfriend So I Teased Her And Said You Must Be A Virgin And It Turns Out That She Was The Real Thing So I Asked Her Isn't There A Boy That You Like And Then She Said To My Surprise That She Was In Love With Me So She Had A Brother Complex