MCs have an adopted son who is half demon half human.
2nd life is re-encounter between MCs leaves a bad taste in the mouth that made me almost drop the manhua, only reason I continued it is because of the Son reuniting with the reincarnation of his dad and his dad actually considering him his adopted son in return.
Woah also I like how the 2nd life ( Ji Jiu) was firm and unwavering and told the ML that he was wrong and that he forced himself on MC which was very wrong of him and he continuously got hurt because of ML.
Seek For Three Lifetimes