The script is cleaned up for swear-words (replaced with ****). There are a few scenes that are meant to be for discussion, but if you have played the games with a few different paths I don't think there should be anything that would suddenly be very bad.
If you want to be 100 % sure you can browse through the script, it is not very long. By typing "esdump" (eli script dump) while in the game, it will output two files on your desktop: the script file, and a configuration file for Notepad++ to give colour highlighting (optional).
(Note that as long as you have the script file there, the game will use the one on your desktop, so you could change the story, but if you just rename or delete the file the game will revert back to using the script it was shipped with.)
Please let me know if there is anything I can help you with :-)