Seems there's a Sex Expansion mod already that seems to work (once you remove 3 files - specified in the thread). I doubt my attempt is better, so you can just roll that one in easily (it only needs the NEW action files added)
Regarding my items - I tested them with this update. They work a-is.
Mind you, I didn't change or test the item exchange in Umbra yet, nor did I add the bit of code that adds items to enemies/mobs yet, but I doubt anything changed there either.