Script adds a hoe at CJ's House.

You can replace with any skin mods you download, just rename it to "wfycrk"
Like this one, it really fits in the game:

http://www.gtainside.com/en/sanandreas/skins/62433-bfypro-redone-16-07-14

When near her press Action Button(TAB by default) to have sex, this adds her to your gang, and gives you health! If you don't have enough cash she doesn't spawn. If she's already with you and you run out of cash, she stays with you, but you can't have sex until you have $5000 again.

>>>>>>>>>>>IMPORTANT!!!<<<<<<<<<<<<<
You will need this script to get her out of the house:

http://www.gtagarage.com/mods/show.php?id=3562

BONUS
It's the funniest with this nude Cj mod:

http://www.gamemodding.net/en/gta-san-andreas/gta-sa-mods/47642-nude-mod-for-cj.html