With all due respect, you said about Sophia not having sex, you didn't mention with whom only sex, the devil is in the details. So, there
IS sex in the game,
NOT with the ones we want...yet but there
IS sex in the game even with animations and sound. As for the rest, that's the deal of the game, the descent from morality, faithfulness, and decency from a Wife A Mother to corruption. It's not only the destination...it's also the journey.
Obviously is not what most people expect from this game, and everyone can tell you that even me, very few if any at all would care to play the good wife path because it is indeed boring but from claiming that there's no sex in the game? no, most people wouldn't do that but they can certainly enjoy the falling into full corruption slowly and steady to savor it.