I don't think me little sister is very educated on sex?

Ok, I'm 14 and she's 13. My parents never really told me anything about sex, because I figured out all that stuff pretty early in my life because I was one of those little kids who don't stop asking until they figure it out. My sister on the other hand dosen't know much about sex based upon things she's said to me. She only knows that a guy and girl have vaginal sex and can have a baby. But she dosen't know what oral or anal sex is, she barely knows any terms that are used, and things like climax, orgasm, etc. She dosen't even know what masturbating is! This could not be good for her later in life so I was wondering if I should like tell my parents or something?