Darkwind was Gauihu's protege, and thought of him as a father-figure. Gauihu going insane...Did very interesting things to Darkwinds psyche.
And yes, Gauihu had...Two kids? Maybe three with Armitage. He succeeded in killing one of them before Armitage managed a rescue.
Then during the whole mess an undead horde rose up in Riverholm, and Gauihu went and danced with them...