From the Game Blog on Blogspot:
Content that I will not be adding to this game, in no order:
Futa
Furry
Scat
Piss
Vore
Under aged
Excessive Violence and Gore.
M/M content
Probably some other stuff too that i've forgotten about
I don't see the dev making an exception for shemale/dickgirl characters, you can try seeing if someone made Mods.