Yeah, I wasn't too fond of the patriarchal rule you imposed for your dynasty, but that's just because I"m more of a feminist(sorry, that had to be said) and had nothing to do with your theme, okay? I'm expecting Queen to be groomed into a tomboy but tomboys are cool stereotypes.
How about instead of a Man Dynasty, you make this a War of the Sexes dynasty? Just let the game choose gender and have the Men and Girls duke it out to see who is better and can one-up the other. You don't have to go all prissy frilly sugar-pop stuff, as not all girls are sugar and spice. (TV Tropes.com has a ton of female only tropes that are masculine - Action Girl, Little Miss Badnik, etc, etc.) In the end, whoever is the most macho will get to be the king(or queen) of the hill! This is taking lemons and making lemon sushi out of it.
Also, if you are having troubles with moodlets and feeding good meals to your preggy Sims, how about replacing the Good Meal moodlet with many others like going to the spa for a massage? I can think of a dozen posi-moodlets that can replace the Meal ones and still keep a woman in a good mood when they go into labor. Just a suggestion.