Okay, that makes sense, then. If you hadn't used cheesecake, I would have wondered what happened there.

The child that Brandi is carrying when you start the game is a male Brandi clone. This happens because the data for Skip Broke is missing somehow, and if only one parent is present, you get an opposite gender clone child. (I always call that son Brandon, since he's so much like his mother.) You should take a look at those twins to see if they're identical, since that may be the only way to make identical twins in the game. What a great idea!