His words were difficult to understand back then but as he grew older he understood what he meant.
"The Luo family members are incredibly patient hunters but when they do catch their prey they love to the point of obsession. Your mother almost killed a man due to heartbreak and if it weren't for you I might not have been able to stop it. Just remember it's in your genes and no generation can skip this," he had said to him after three-year-old Luo Muchen had ruthlessly bit the nanny like a little demon after she took his favourite blanky away without his permission.
Day by day he could clearly feel that his possessiveness over Qie Xieling was growing stronger. It's a good thing that Qie Xieling hadn't dated anyone otherwise he would undoubtedly lose his shit and show the side of him that he didn't want others to see.
Please check out Venerable Demon King & The Doting Immortal