Camping Trip:
http://aifcommunity.org/games/tads/campingtrip.zip.
Re: Threesome with Molly and Becky
The key is to make sure they are both in love with you at the party. Becky will automatically be in love with (whatever you've done) if you make up with her on day 4.
You can get Molly in love with you by the party with one good date (RomCom is the best first date), if you tell her you've broken up with Becky, and given her a good gift (bracelet or necklace if you want anal). A second date just seals the deal (expensive restaurant or woods are good).
The main thing you have to do then is make sure that Molly doesn't catch you with Becky (ie. when you're in the stationary closet with Becky don't do anything, just wait until Becky has to leave).
When you get to the party, save the game. You may need to reload if the subject of threesomes doesn't come up during truth or dare. Then, when Molly says she wants to have sex with you, initially leave with Becky. If everything's gone right, Molly should then say, "What about a threesome?"
Hope that helps