In real life, yes. But in the game they do. Plus, I tried to kill her by plot and she found out. And then I divorced her. Let's just say she was very pissed off. LOL
Actually, the acidity vs. alkaline levels of a woman's lady parts can influence which gender the children are. However it's more likely that a man's dangly bits are to blame since you can't have girls if you're not producing female sperm.
So yeah, this is actually a part of the game's code?