My main, a male human light side Sith Juggernaut has 3 children with Vette - Twi'liek female twins that are Jedi Sage (light side, conventional Jedi) and Gunslinger (typical smuggler, rebellious although good, taking most light side options) whom were both taken from the empire at birth. His son is a Cyborg Imperial Agent - he's an imperial loyalist for the most part and is extremely proud of his heritage, although he was shunned from the Sith academy for his cybernetic modifications. For this reason he became an agent, and isn't particularly fond of the Sith society as a whole other than his father.
Have you seen most of the Sith NPC's in this game? >.>