The booklet wrote that after daughters of the Qian Family married out, there was a certain chance for their children to exhibit Demonization. That unfortunate cousin of Gu Shi Yi really hit the jackpot, contracting the triple inheritance. It's also mentioned here, according to Qian Xun's research, this might be because the paternal bloodline also contains traces of the Demon Clan's blood, though it was very diluted. When the two bloodlines interacted, a child afflicted with Demonization would be born.
So the Sun Family might also carry the Demon Clan's bloodline!
