Sister as an adult, and packaged as such.
By the way, these are with defaulted skins so if you have different defaults, they might not look the same as they do in game for me.
Sister Yellow- http://www.box.net/shared/oekbijnuki
Brother Yellow- http://www.box.net/shared/4966pk4okz
They do come with custom content (mainly makeup) because I'm lazy, so you can just keep the hair (since otherwise they'll be bald in Body Shop and you can't change hair unless you go in-game).
CC included: Miki, Rensim, Pooklet (geneticized eyes, warning), Mermaid Cove, Lunar Eclipse, LaPink, Rissa.
Enjoy them, everyone :)