Quotes / Not Blood Siblings

"Even though we're not related by blood..."
— Too many incest hentai to count.

Jack: What's coming?
Locke: Something mysterious, but first here comes a father and a son. And a Korean who speaks perfect English, but nobody knows it yet. Oh yeah, there's also a hot blonde who's had sex with her brother, but they are not blood related so it's okay... kind of.
Mad TV's Lost parody

"The main characters are your standard JRPG pick-and-mix. There's the pretty-boy hero who comes across as wetter than a swimming pool in New Orleans; the angry, immature girl who secretly craves pretty-boy cock; the hero's ADOPTED sister, whose non-blood related status is made abundantly clear to a somewhat suspect degree.

Matt: [reading text] I'm tired of my sister- She is your cousin A. And B that's still terrible.
Matt from Two Best Friends as he plays a Bible Black game

Sora: And that's my gamer sister!
Shiro: Who's not related by blood.
Sora: Who's not related by blood!
Shiro: Let me sit on your lap.
Sora: Did I mention she's still not related by blood? Cause it would be totally weird if she were related by blood. So it's a good thing she's not related by blood. At all.
Shiro: I am eleven though-

"Now, you may discover that your sister is adopted. She may actually be your stepsister or your cousin. In such special circumstances, STILL DON'T HAVE SEX WITH HER, YOU DEGENERATE, GARBAGE HUMAN BEING!! JESUS H. CHRIST, THERE ARE HALF A DOZEN BEAUTIFUL, NOT-RELATED-TO-YOU-AT-ALL WOMEN IN YOUR LIFE RIGHT NOW, WHAT'S WRONG WITH YOU!?"