TBH I wouldn't mind this. Simply because I usually play an assassin based character and what better way to catch my prey than to seduce them? Or Vampires needing to feed. Fable also didn't do to bad with "sex" by blacking out the screen, having some comedic dialogue and being done. I was a little disappointed to find out that I could get married in Skyrim but thats as far as it goes.... If I marry an NPC in a game for role playing as my barbarian, assassin, or master thief I would expect to be able to have fake kids with them similar to fable....